18874665 has 24 divisors (see below), whose sum is σ = 32817408. Its totient is φ = 10035360.

The previous prime is 18874649. The next prime is 18874703. The reversal of 18874665 is 56647881.

It is a happy number.

18874665 is a `hidden beast` number, since 188 + 7 + 466 + 5 = 666.

It is not a de Polignac number, because 18874665 - 2⁴ = 18874649 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18874665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26970 + ... + 27660.

It is an arithmetic number, because the mean of its divisors is an integer number (1367392).

Almost surely, 2^18874665 is an apocalyptic number.

18874665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18874665 is a deficient number, since it is larger than the sum of its proper divisors (13942743).

18874665 is a wasteful number, since it uses less digits than its factorization.

18874665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1306 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 18874665 is about 4344.4982449070. The cubic root of 18874665 is about 266.2521258840.

The spelling of 18874665 in words is "eighteen million, eight hundred seventy-four thousand, six hundred sixty-five".