18397605 has 16 divisors (see below), whose sum is σ = 30985920. Its totient is φ = 9295488.

The previous prime is 18397583. The next prime is 18397607. The reversal of 18397605 is 50679381.

It is not a de Polignac number, because 18397605 - 2⁶ = 18397541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397607) 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, 31992 + ... + 32561.

It is an arithmetic number, because the mean of its divisors is an integer number (1936620).

Almost surely, 2^18397605 is an apocalyptic number.

18397605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18397605 is a deficient number, since it is larger than the sum of its proper divisors (12588315).

18397605 is a wasteful number, since it uses less digits than its factorization.

18397605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64580.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 18397605 is about 4289.2429401935. The cubic root of 18397605 is about 263.9897694612.

The spelling of 18397605 in words is "eighteen million, three hundred ninety-seven thousand, six hundred five".