18895980 has 24 divisors (see below), whose sum is σ = 52908912. Its totient is φ = 5038912.

The previous prime is 18895979. The next prime is 18895991. The reversal of 18895980 is 8959881.

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, 157407 + ... + 157526.

It is an arithmetic number, because the mean of its divisors is an integer number (2204538).

Almost surely, 2^18895980 is an apocalyptic number.

18895980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18895980 is an abundant number, since it is smaller than the sum of its proper divisors (34012932).

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

18895980 is a wasteful number, since it uses less digits than its factorization.

18895980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314945 (or 314943 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 18895980 is about 4346.9506553445. The cubic root of 18895980 is about 266.3523136065.

The spelling of 18895980 in words is "eighteen million, eight hundred ninety-five thousand, nine hundred eighty".