18380479 has 16 divisors (see below), whose sum is σ = 20490624. Its totient is φ = 16380000.

The previous prime is 18380471. The next prime is 18380497. The reversal of 18380479 is 97408381.

It is not a de Polignac number, because 18380479 - 2³ = 18380471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73104 + ... + 73354.

It is an arithmetic number, because the mean of its divisors is an integer number (1280664).

Almost surely, 2^18380479 is an apocalyptic number.

18380479 is a deficient number, since it is larger than the sum of its proper divisors (2110145).

18380479 is a wasteful number, since it uses less digits than its factorization.

18380479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 18380479 is about 4287.2460857758. The cubic root of 18380479 is about 263.9078295858.

The spelling of 18380479 in words is "eighteen million, three hundred eighty thousand, four hundred seventy-nine".