18392997 has 16 divisors (see below), whose sum is σ = 29676672. Its totient is φ = 9891840.

The previous prime is 18392981. The next prime is 18392999. The reversal of 18392997 is 79929381.

It is not a de Polignac number, because 18392997 - 2⁴ = 18392981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18392999) 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, 25404 + ... + 26117.

It is an arithmetic number, because the mean of its divisors is an integer number (1854792).

Almost surely, 2^18392997 is an apocalyptic number.

18392997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18392997 is a deficient number, since it is larger than the sum of its proper divisors (11283675).

18392997 is a wasteful number, since it uses less digits than its factorization.

18392997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51548.

The product of its digits is 244944, while the sum is 48.

The square root of 18392997 is about 4288.7057488245. The cubic root of 18392997 is about 263.9677273452.

The spelling of 18392997 in words is "eighteen million, three hundred ninety-two thousand, nine hundred ninety-seven".