18085379 has 4 divisors (see below), whose sum is σ = 19476576. Its totient is φ = 16694184.

The previous prime is 18085373. The next prime is 18085381. The reversal of 18085379 is 97358081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-18085379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18085373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695579 + ... + 695604.

It is an arithmetic number, because the mean of its divisors is an integer number (4869144).

Almost surely, 2^18085379 is an apocalyptic number.

18085379 is a deficient number, since it is larger than the sum of its proper divisors (1391197).

18085379 is a wasteful number, since it uses less digits than its factorization.

18085379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391196.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 18085379 is about 4252.6907952495. The cubic root of 18085379 is about 262.4878494754.

The spelling of 18085379 in words is "eighteen million, eighty-five thousand, three hundred seventy-nine".