18256857480 has 96 divisors (see below), whose sum is σ = 59411102400. Its totient is φ = 4862233728.

The previous prime is 18256857473. The next prime is 18256857529. The reversal of 18256857480 is 8475865281.

18256857480 is a `hidden beast` number, since 1 + 8 + 2 + 5 + 68 + 574 + 8 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251101 + ... + 315539.

It is an arithmetic number, because the mean of its divisors is an integer number (618865650).

Almost surely, 2^18256857480 is an apocalyptic number.

18256857480 is a gapful number since it is divisible by the number (10) 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 18256857480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29705551200).

18256857480 is an abundant number, since it is smaller than the sum of its proper divisors (41154244920).

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

18256857480 is a wasteful number, since it uses less digits than its factorization.

18256857480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65243 (or 65236 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 18256857480 in words is "eighteen billion, two hundred fifty-six million, eight hundred fifty-seven thousand, four hundred eighty".