18683685 has 48 divisors (see below), whose sum is σ = 34070400. Its totient is φ = 9459072.

The previous prime is 18683657. The next prime is 18683723. The reversal of 18683685 is 58638681.

It is not a de Polignac number, because 18683685 - 2¹⁰ = 18682661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18683685.

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, 134346 + ... + 134484.

It is an arithmetic number, because the mean of its divisors is an integer number (709800).

Almost surely, 2^18683685 is an apocalyptic number.

18683685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18683685 is a deficient number, since it is larger than the sum of its proper divisors (15386715).

18683685 is a wasteful number, since it uses less digits than its factorization.

18683685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 279 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 18683685 is about 4322.4628396321. The cubic root of 18683685 is about 265.3510714231.

It can be divided in two parts, 186 and 83685, that multiplied together give a triangular number (15565410 = T₅₅₇₉).

The spelling of 18683685 in words is "eighteen million, six hundred eighty-three thousand, six hundred eighty-five".