18979090 has 32 divisors (see below), whose sum is σ = 37356480. Its totient is φ = 6899904.

The previous prime is 18979087. The next prime is 18979111. The reversal of 18979090 is 9097981.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 7621 + ... + 9799.

It is an arithmetic number, because the mean of its divisors is an integer number (1167390).

Almost surely, 2^18979090 is an apocalyptic number.

18979090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18979090 is a deficient number, since it is larger than the sum of its proper divisors (18377390).

18979090 is a wasteful number, since it uses less digits than its factorization.

18979090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 18979090 is about 4356.4997417652. The cubic root of 18979090 is about 266.7422407329.

The spelling of 18979090 in words is "eighteen million, nine hundred seventy-nine thousand, ninety".