18836379 has 12 divisors (see below), whose sum is σ = 28391376. Its totient is φ = 12011472.

The previous prime is 18836369. The next prime is 18836383. The reversal of 18836379 is 97363881.

It is a happy number.

18836379 is a `hidden beast` number, since 1 + 8 + 8 + 3 + 637 + 9 = 666.

It is not a de Polignac number, because 18836379 - 2⁸ = 18836123 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18836329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45292 + ... + 45705.

It is an arithmetic number, because the mean of its divisors is an integer number (2365948).

Almost surely, 2^18836379 is an apocalyptic number.

18836379 is a deficient number, since it is larger than the sum of its proper divisors (9554997).

18836379 is a wasteful number, since it uses less digits than its factorization.

18836379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91026 (or 91023 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 18836379 is about 4340.0897456159. The cubic root of 18836379 is about 266.0719791264.

The spelling of 18836379 in words is "eighteen million, eight hundred thirty-six thousand, three hundred seventy-nine".