20331212031 has 16 divisors (see below), whose sum is σ = 32437261920. Its totient is φ = 12511514880.

The previous prime is 20331212021. The next prime is 20331212039. The reversal of 20331212031 is 13021213302.

20331212031 is a `hidden beast` number, since 203 + 312 + 120 + 31 = 666.

It is not a de Polignac number, because 20331212031 - 2⁷ = 20331211903 is a prime.

It is a super-2 number, since 2×20331212031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20331211995 and 20331212013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331212039) 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, 28961490 + ... + 28962191.

It is an arithmetic number, because the mean of its divisors is an integer number (2027328870).

Almost surely, 2^20331212031 is an apocalyptic number.

20331212031 is a deficient number, since it is larger than the sum of its proper divisors (12106049889).

20331212031 is a wasteful number, since it uses less digits than its factorization.

20331212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57923703 (or 57923697 counting only the distinct ones).

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

Adding to 20331212031 its reverse (13021213302), we get a palindrome (33352425333).

The spelling of 20331212031 in words is "twenty billion, three hundred thirty-one million, two hundred twelve thousand, thirty-one".