18979195 has 24 divisors (see below), whose sum is σ = 25102800. Its totient is φ = 13720896.

The previous prime is 18979171. The next prime is 18979217. The reversal of 18979195 is 59197981.

It is a happy number.

It is not a de Polignac number, because 18979195 - 2⁷ = 18979067 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228624 + ... + 228706.

It is an arithmetic number, because the mean of its divisors is an integer number (1045950).

Almost surely, 2^18979195 is an apocalyptic number.

18979195 is a deficient number, since it is larger than the sum of its proper divisors (6123605).

18979195 is an equidigital number, since it uses as much as digits as its factorization.

18979195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 136 counting only the distinct ones).

The product of its digits is 204120, while the sum is 49.

The square root of 18979195 is about 4356.5117927076. The cubic root of 18979195 is about 266.7427326406.

The spelling of 18979195 in words is "eighteen million, nine hundred seventy-nine thousand, one hundred ninety-five".