18044632572 has 24 divisors (see below), whose sum is σ = 42109711056. Its totient is φ = 6014082048.

The previous prime is 18044632559. The next prime is 18044632577. The reversal of 18044632572 is 27523644081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18044632577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023 + ... + 189974.

It is an arithmetic number, because the mean of its divisors is an integer number (1754571294).

Almost surely, 2^18044632572 is an apocalyptic number.

18044632572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18044632572 is an abundant number, since it is smaller than the sum of its proper divisors (24065078484).

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

18044632572 is a wasteful number, since it uses less digits than its factorization.

18044632572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198877 (or 198875 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 18044632572 in words is "eighteen billion, forty-four million, six hundred thirty-two thousand, five hundred seventy-two".