18613385 has 48 divisors (see below), whose sum is σ = 28440720. Its totient is φ = 11612160.

The previous prime is 18613373. The next prime is 18613393. The reversal of 18613385 is 58331681.

It can be written as a sum of positive squares in 8 ways, for example, as 200704 + 18412681 = 448^2 + 4291^2 .

It is not a de Polignac number, because 18613385 - 2⁸ = 18613129 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170711 + ... + 170819.

It is an arithmetic number, because the mean of its divisors is an integer number (592515).

Almost surely, 2^18613385 is an apocalyptic number.

It is an amenable number.

18613385 is a deficient number, since it is larger than the sum of its proper divisors (9827335).

18613385 is a wasteful number, since it uses less digits than its factorization.

18613385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 179 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 18613385 is about 4314.3232377744. The cubic root of 18613385 is about 265.0178461934.

The spelling of 18613385 in words is "eighteen million, six hundred thirteen thousand, three hundred eighty-five".