18872915 has 16 divisors (see below), whose sum is σ = 23750496. Its totient is φ = 14380800.

The previous prime is 18872911. The next prime is 18872927. The reversal of 18872915 is 51927881.

It is not a de Polignac number, because 18872915 - 2² = 18872911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18872911) 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, 7745 + ... + 9885.

It is an arithmetic number, because the mean of its divisors is an integer number (1484406).

Almost surely, 2^18872915 is an apocalyptic number.

18872915 is a deficient number, since it is larger than the sum of its proper divisors (4877581).

18872915 is a wasteful number, since it uses less digits than its factorization.

18872915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its digits is 40320, while the sum is 41.

The square root of 18872915 is about 4344.2968360829. The cubic root of 18872915 is about 266.2438969411.

The spelling of 18872915 in words is "eighteen million, eight hundred seventy-two thousand, nine hundred fifteen".