18979000 has 32 divisors (see below), whose sum is σ = 44413200. Its totient is φ = 7591200.

The previous prime is 18978989. The next prime is 18979003. The reversal of 18979000 is 97981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18979003) 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, 8490 + ... + 10489.

Almost surely, 2^18979000 is an apocalyptic number.

18979000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18979000 is an abundant number, since it is smaller than the sum of its proper divisors (25434200).

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

18979000 is a wasteful number, since it uses less digits than its factorization.

18979000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19000 (or 18986 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 18979000 is about 4356.4894123595. The cubic root of 18979000 is about 266.7418190962.

The spelling of 18979000 in words is "eighteen million, nine hundred seventy-nine thousand".