18874165 has 16 divisors (see below), whose sum is σ = 24109488. Its totient is φ = 14135296.

The previous prime is 18874153. The next prime is 18874171. The reversal of 18874165 is 56147881.

It can be written as a sum of positive squares in 8 ways, for example, as 289444 + 18584721 = 538^2 + 4311^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18874165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19329 + ... + 20281.

It is an arithmetic number, because the mean of its divisors is an integer number (1506843).

Almost surely, 2^18874165 is an apocalyptic number.

It is an amenable number.

18874165 is a deficient number, since it is larger than the sum of its proper divisors (5235323).

18874165 is a wasteful number, since it uses less digits than its factorization.

18874165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its digits is 53760, while the sum is 40.

The square root of 18874165 is about 4344.4407004815. The cubic root of 18874165 is about 266.2497748093.

The spelling of 18874165 in words is "eighteen million, eight hundred seventy-four thousand, one hundred sixty-five".