20312021120 has 64 divisors (see below), whose sum is σ = 49039358040. Its totient is φ = 8044339200.

The previous prime is 20312021083. The next prime is 20312021131. The reversal of 20312021120 is 2112021302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19392233536 + 919787584 = 139256^2 + 30328^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20312021095 and 20312021104.

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, 92477 + ... + 221756.

Almost surely, 2^20312021120 is an apocalyptic number.

20312021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312021120 is an abundant number, since it is smaller than the sum of its proper divisors (28727336920).

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

20312021120 is a wasteful number, since it uses less digits than its factorization.

20312021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314353 (or 314341 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20312021120 its reverse (2112021302), we get a palindrome (22424042422).

The spelling of 20312021120 in words is "twenty billion, three hundred twelve million, twenty-one thousand, one hundred twenty".