20931123412 has 12 divisors (see below), whose sum is σ = 38222051616. Its totient is φ = 10010537240.

The previous prime is 20931123379. The next prime is 20931123413. The reversal of 20931123412 is 21432113902.

It is a happy number.

It is a super-2 number, since 2×20931123412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20931123413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113756014 + ... + 113756197.

It is an arithmetic number, because the mean of its divisors is an integer number (3185170968).

Almost surely, 2^20931123412 is an apocalyptic number.

It is an amenable number.

20931123412 is a deficient number, since it is larger than the sum of its proper divisors (17290928204).

20931123412 is a wasteful number, since it uses less digits than its factorization.

20931123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227512238 (or 227512236 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 20931123412 in words is "twenty billion, nine hundred thirty-one million, one hundred twenty-three thousand, four hundred twelve".