20931112912 has 40 divisors (see below), whose sum is σ = 42968606976. Its totient is φ = 9843273216.

The previous prime is 20931112907. The next prime is 20931112949. The reversal of 20931112912 is 21921113902.

It is a super-2 number, since 2×20931112912² (a number of 21 digits) contains 22 as substring.

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, 388993 + ... + 439519.

Almost surely, 2^20931112912 is an apocalyptic number.

It is an amenable number.

20931112912 is an abundant number, since it is smaller than the sum of its proper divisors (22037494064).

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

20931112912 is a wasteful number, since it uses less digits than its factorization.

20931112912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52075 (or 52069 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 20931112912 in words is "twenty billion, nine hundred thirty-one million, one hundred twelve thousand, nine hundred twelve".