18979250 has 32 divisors (see below), whose sum is σ = 35970480. Its totient is φ = 7497600.

The previous prime is 18979249. The next prime is 18979267. The reversal of 18979250 is 5297981.

It can be written as a sum of positive squares in 8 ways, for example, as 1229881 + 17749369 = 1109^2 + 4213^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18979198 and 18979207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21824 + ... + 22676.

Almost surely, 2^18979250 is an apocalyptic number.

18979250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18979250 is a deficient number, since it is larger than the sum of its proper divisors (16991230).

18979250 is an equidigital number, since it uses as much as digits as its factorization.

18979250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 18979250 is about 4356.5181050926. The cubic root of 18979250 is about 266.7429903058.

The spelling of 18979250 in words is "eighteen million, nine hundred seventy-nine thousand, two hundred fifty".