18572216690 has 32 divisors (see below), whose sum is σ = 33565570560. Its totient is φ = 7398820800.

The previous prime is 18572216687. The next prime is 18572216713. The reversal of 18572216690 is 9661227581.

It is a happy number.

It is a super-2 number, since 2×18572216690² (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 15 ways as a sum of consecutive naturals, for example, 2716196 + ... + 2723024.

It is an arithmetic number, because the mean of its divisors is an integer number (1048924080).

Almost surely, 2^18572216690 is an apocalyptic number.

18572216690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18572216690 is a deficient number, since it is larger than the sum of its proper divisors (14993353870).

18572216690 is a wasteful number, since it uses less digits than its factorization.

18572216690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7898.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 18572216690 in words is "eighteen billion, five hundred seventy-two million, two hundred sixteen thousand, six hundred ninety".