23218820256 has 48 divisors (see below), whose sum is σ = 61042905504. Its totient is φ = 7727733504.

The previous prime is 23218820213. The next prime is 23218820267. The reversal of 23218820256 is 65202881232.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×23218820256² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122506 + ... + 247881.

It is an arithmetic number, because the mean of its divisors is an integer number (1271727198).

Almost surely, 2^23218820256 is an apocalyptic number.

It is an amenable number.

23218820256 is an abundant number, since it is smaller than the sum of its proper divisors (37824085248).

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

23218820256 is a wasteful number, since it uses less digits than its factorization.

23218820256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371053 (or 371045 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 23218820256 in words is "twenty-three billion, two hundred eighteen million, eight hundred twenty thousand, two hundred fifty-six".