18900379 has 4 divisors (see below), whose sum is σ = 20012184. Its totient is φ = 17788576.

The previous prime is 18900367. The next prime is 18900389. The reversal of 18900379 is 97300981.

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

It is a cyclic number.

It is not a de Polignac number, because 18900379 - 2⁵ = 18900347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18900389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555877 + ... + 555910.

It is an arithmetic number, because the mean of its divisors is an integer number (5003046).

Almost surely, 2^18900379 is an apocalyptic number.

18900379 is a deficient number, since it is larger than the sum of its proper divisors (1111805).

18900379 is a wasteful number, since it uses less digits than its factorization.

18900379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111804.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 18900379 is about 4347.4566127795. The cubic root of 18900379 is about 266.3729810168.

The spelling of 18900379 in words is "eighteen million, nine hundred thousand, three hundred seventy-nine".