20312012331 has 32 divisors (see below), whose sum is σ = 32476881920. Its totient is φ = 12472602912.

The previous prime is 20312012317. The next prime is 20312012381. The reversal of 20312012331 is 13321021302.

20312012331 is a `hidden beast` number, since 20 + 312 + 0 + 1 + 2 + 331 = 666.

It is not a de Polignac number, because 20312012331 - 2¹¹ = 20312010283 is a prime.

It is a super-2 number, since 2×20312012331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312012381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100020 + ... + 225006.

It is an arithmetic number, because the mean of its divisors is an integer number (1014902560).

Almost surely, 2^20312012331 is an apocalyptic number.

20312012331 is a deficient number, since it is larger than the sum of its proper divisors (12164869589).

20312012331 is a wasteful number, since it uses less digits than its factorization.

20312012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125472 (or 125466 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20312012331 its reverse (13321021302), we get a palindrome (33633033633).

The spelling of 20312012331 in words is "twenty billion, three hundred twelve million, twelve thousand, three hundred thirty-one".