1323322020 has 288 divisors, whose sum is σ = 4409862912. Its totient is φ = 320246784.

The previous prime is 1323322009. The next prime is 1323322031. The reversal of 1323322020 is 202233231.

It is a happy number.

1323322020 is a `hidden beast` number, since 1 + 323 + 322 + 0 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1323322009) and next prime (1323322031).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1323321984 and 1323322002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8118459 + ... + 8118621.

It is an arithmetic number, because the mean of its divisors is an integer number (15312024).

Almost surely, 2^1323322020 is an apocalyptic number.

1323322020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323322020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2204931456).

1323322020 is an abundant number, since it is smaller than the sum of its proper divisors (3086540892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323322020 is a wasteful number, since it uses less digits than its factorization.

1323322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 1323322020 is about 36377.4933166099. The cubic root of 1323322020 is about 1097.8807737803.

Adding to 1323322020 its reverse (202233231), we get a palindrome (1525555251).

It can be divided in two parts, 13233 and 22020, that added together give a palindrome (35253).

The spelling of 1323322020 in words is "one billion, three hundred twenty-three million, three hundred twenty-two thousand, twenty".