18902216256 has 224 divisors, whose sum is σ = 62975093760. Its totient is φ = 4860672000.

The previous prime is 18902216239. The next prime is 18902216261. The reversal of 18902216256 is 65261220981.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1486855 + ... + 1499513.

Almost surely, 2^18902216256 is an apocalyptic number.

18902216256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18902216256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31487546880).

18902216256 is an abundant number, since it is smaller than the sum of its proper divisors (44072877504).

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

18902216256 is a wasteful number, since it uses less digits than its factorization.

18902216256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12793 (or 12783 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 18902216256 in words is "eighteen billion, nine hundred two million, two hundred sixteen thousand, two hundred fifty-six".