23131444218 has 16 divisors (see below), whose sum is σ = 48274318656. Its totient is φ = 7375243040.

The previous prime is 23131444211. The next prime is 23131444223. The reversal of 23131444218 is 81244413132.

It is a super-2 number, since 2×23131444218² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23131444211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83809443 + ... + 83809718.

It is an arithmetic number, because the mean of its divisors is an integer number (3017144916).

Almost surely, 2^23131444218 is an apocalyptic number.

23131444218 is an abundant number, since it is smaller than the sum of its proper divisors (25142874438).

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

23131444218 is a wasteful number, since it uses less digits than its factorization.

23131444218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167619189.

The product of its digits is 18432, while the sum is 33.

The spelling of 23131444218 in words is "twenty-three billion, one hundred thirty-one million, four hundred forty-four thousand, two hundred eighteen".