18516895056 has 320 divisors, whose sum is σ = 61965081600. Its totient is φ = 5234803200.

The previous prime is 18516894971. The next prime is 18516895093. The reversal of 18516895056 is 65059861581.

18516895056 is a `hidden beast` number, since 1 + 8 + 51 + 6 + 89 + 505 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 18516894993 and 18516895011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6047766 + ... + 6050826.

It is an arithmetic number, because the mean of its divisors is an integer number (193640880).

Almost surely, 2^18516895056 is an apocalyptic number.

18516895056 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 18516895056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30982540800).

18516895056 is an abundant number, since it is smaller than the sum of its proper divisors (43448186544).

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

18516895056 is a wasteful number, since it uses less digits than its factorization.

18516895056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175 (or 3163 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 54.

The spelling of 18516895056 in words is "eighteen billion, five hundred sixteen million, eight hundred ninety-five thousand, fifty-six".