18045680 has 40 divisors (see below), whose sum is σ = 42211584. Its totient is φ = 7174400.

The previous prime is 18045679. The next prime is 18045739. The reversal of 18045680 is 8654081.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 14690 + ... + 15870.

Almost surely, 2^18045680 is an apocalyptic number.

18045680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18045680 is an abundant number, since it is smaller than the sum of its proper divisors (24165904).

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

18045680 is a wasteful number, since it uses less digits than its factorization.

18045680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 18045680 is about 4248.0207155804. The cubic root of 18045680 is about 262.2956474561.

The spelling of 18045680 in words is "eighteen million, forty-five thousand, six hundred eighty".