1323100020 has 96 divisors (see below), whose sum is σ = 4150774656. Its totient is φ = 312076800.

The previous prime is 1323100007. The next prime is 1323100049. The reversal of 1323100020 is 200013231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1323099969 and 1323100005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2671 + ... + 51510.

It is an arithmetic number, because the mean of its divisors is an integer number (43237236).

Almost surely, 2^1323100020 is an apocalyptic number.

1323100020 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 1323100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2075387328).

1323100020 is an abundant number, since it is smaller than the sum of its proper divisors (2827674636).

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

1323100020 is a wasteful number, since it uses less digits than its factorization.

1323100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54241 (or 54239 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1323100020 is about 36374.4418513879. The cubic root of 1323100020 is about 1097.8193769928.

Adding to 1323100020 its reverse (200013231), we get a palindrome (1523113251).

The spelling of 1323100020 in words is "one billion, three hundred twenty-three million, one hundred thousand, twenty".