18307379 has 16 divisors (see below), whose sum is σ = 19844352. Its totient is φ = 16846368.

The previous prime is 18307363. The next prime is 18307397. The reversal of 18307379 is 97370381.

18307379 = T₃₀₂ + T₃₀₃ + ... + T₅₁₅.

It is a happy number.

It is not a de Polignac number, because 18307379 - 2⁴ = 18307363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18307309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105737 + ... + 105909.

It is an arithmetic number, because the mean of its divisors is an integer number (1240272).

Almost surely, 2^18307379 is an apocalyptic number.

18307379 is a deficient number, since it is larger than the sum of its proper divisors (1536973).

18307379 is a wasteful number, since it uses less digits than its factorization.

18307379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 18307379 is about 4278.7123062903. The cubic root of 18307379 is about 263.5575069490.

The spelling of 18307379 in words is "eighteen million, three hundred seven thousand, three hundred seventy-nine".