1220330020 has 48 divisors (see below), whose sum is σ = 3154088448. Its totient is φ = 386213760.

The previous prime is 1220330009. The next prime is 1220330029. The reversal of 1220330020 is 200330221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1220330029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333436 + ... + 337075.

It is an arithmetic number, because the mean of its divisors is an integer number (65710176).

Almost surely, 2^1220330020 is an apocalyptic number.

1220330020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220330020 is an abundant number, since it is smaller than the sum of its proper divisors (1933758428).

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

1220330020 is a wasteful number, since it uses less digits than its factorization.

1220330020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670540 (or 670538 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1220330020 is about 34933.2222962612. Note that the first 4 decimals coincide. The cubic root of 1220330020 is about 1068.6260701460.

Adding to 1220330020 its reverse (200330221), we get a palindrome (1420660241).

The spelling of 1220330020 in words is "one billion, two hundred twenty million, three hundred thirty thousand, twenty".