20321013120 has 64 divisors (see below), whose sum is σ = 64773235440. Its totient is φ = 5418936320.

The previous prime is 20321013077. The next prime is 20321013137. The reversal of 20321013120 is 2131012302.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20321013120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5290011 + ... + 5293850.

Almost surely, 2^20321013120 is an apocalyptic number.

20321013120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321013120 is an abundant number, since it is smaller than the sum of its proper divisors (44452222320).

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

20321013120 is a wasteful number, since it uses less digits than its factorization.

20321013120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10583883 (or 10583871 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20321013120 its reverse (2131012302), we get a palindrome (22452025422).

The spelling of 20321013120 in words is "twenty billion, three hundred twenty-one million, thirteen thousand, one hundred twenty".