23231945856 has 192 divisors, whose sum is σ = 72698256000. Its totient is φ = 6553257984.

The previous prime is 23231945761. The next prime is 23231945857. The reversal of 23231945856 is 65854913232.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×23231945856² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (23231945857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1478650 + ... + 1494278.

It is an arithmetic number, because the mean of its divisors is an integer number (378636750).

Almost surely, 2^23231945856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23231945856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36349128000).

23231945856 is an abundant number, since it is smaller than the sum of its proper divisors (49466310144).

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

23231945856 is a wasteful number, since it uses less digits than its factorization.

23231945856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15739 (or 15720 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The spelling of 23231945856 in words is "twenty-three billion, two hundred thirty-one million, nine hundred forty-five thousand, eight hundred fifty-six".