18331379 has 6 divisors (see below), whose sum is σ = 20149500. Its totient is φ = 16664780.

The previous prime is 18331367. The next prime is 18331381. The reversal of 18331379 is 97313381.

It is not a de Polignac number, because 18331379 - 2²⁰ = 17282803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18331349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75629 + ... + 75870.

It is an arithmetic number, because the mean of its divisors is an integer number (3358250).

Almost surely, 2^18331379 is an apocalyptic number.

18331379 is a deficient number, since it is larger than the sum of its proper divisors (1818121).

18331379 is a wasteful number, since it uses less digits than its factorization.

18331379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151521 (or 151510 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 18331379 is about 4281.5159698406. The cubic root of 18331379 is about 263.6726266156.

The spelling of 18331379 in words is "eighteen million, three hundred thirty-one thousand, three hundred seventy-nine".