18285981576 has 32 divisors (see below), whose sum is σ = 45720447840. Its totient is φ = 6094594688.

The previous prime is 18285981547. The next prime is 18285981587. The reversal of 18285981576 is 67518958281.

It is a super-2 number, since 2×18285981576² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181015 + ... + 263321.

It is an arithmetic number, because the mean of its divisors is an integer number (1428763995).

Almost surely, 2^18285981576 is an apocalyptic number.

It is an amenable number.

18285981576 is an abundant number, since it is smaller than the sum of its proper divisors (27434466264).

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

18285981576 is a wasteful number, since it uses less digits than its factorization.

18285981576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91573 (or 91569 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 60.

The spelling of 18285981576 in words is "eighteen billion, two hundred eighty-five million, nine hundred eighty-one thousand, five hundred seventy-six".