18856579560 has 512 divisors, whose sum is σ = 73295953920. Its totient is φ = 3773952000.

The previous prime is 18856579559. The next prime is 18856579627. The reversal of 18856579560 is 6597565881.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 18856579494 and 18856579503.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17941035 + ... + 17942085.

It is an arithmetic number, because the mean of its divisors is an integer number (143156160).

Almost surely, 2^18856579560 is an apocalyptic number.

18856579560 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 18856579560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36647976960).

18856579560 is an abundant number, since it is smaller than the sum of its proper divisors (54439374360).

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

18856579560 is a wasteful number, since it uses less digits than its factorization.

18856579560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 60.

The spelling of 18856579560 in words is "eighteen billion, eight hundred fifty-six million, five hundred seventy-nine thousand, five hundred sixty".