18372959 has 4 divisors (see below), whose sum is σ = 20043240. Its totient is φ = 16702680.

The previous prime is 18372953. The next prime is 18372967. The reversal of 18372959 is 95927381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95927381 = 11 ⋅8720671.

It is a cyclic number.

It is not a de Polignac number, because 18372959 - 2⁸ = 18372703 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 (18372953) 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 3 ways as a sum of consecutive naturals, for example, 835124 + ... + 835145.

It is an arithmetic number, because the mean of its divisors is an integer number (5010810).

Almost surely, 2^18372959 is an apocalyptic number.

18372959 is a deficient number, since it is larger than the sum of its proper divisors (1670281).

18372959 is a wasteful number, since it uses less digits than its factorization.

18372959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670280.

The product of its digits is 136080, while the sum is 44.

The square root of 18372959 is about 4286.3689761849. The cubic root of 18372959 is about 263.8718338320.

The spelling of 18372959 in words is "eighteen million, three hundred seventy-two thousand, nine hundred fifty-nine".