23018432256 has 180 divisors, whose sum is σ = 68975201064. Its totient is φ = 7634995200.

The previous prime is 23018432251. The next prime is 23018432273. The reversal of 23018432256 is 65223481032.

It is a super-2 number, since 2×23018432256² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23018432256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23018432251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4372666 + ... + 4377926.

Almost surely, 2^23018432256 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 23018432256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34487600532).

23018432256 is an abundant number, since it is smaller than the sum of its proper divisors (45956768808).

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

23018432256 is an equidigital number, since it uses as much as digits as its factorization.

23018432256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500 (or 5477 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 23018432256 in words is "twenty-three billion, eighteen million, four hundred thirty-two thousand, two hundred fifty-six".