18512945 has 8 divisors (see below), whose sum is σ = 24235200. Its totient is φ = 13463920.

The previous prime is 18512941. The next prime is 18512957. The reversal of 18512945 is 54921581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18512945 - 2² = 18512941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18512941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168245 + ... + 168354.

It is an arithmetic number, because the mean of its divisors is an integer number (3029400).

Almost surely, 2^18512945 is an apocalyptic number.

It is an amenable number.

18512945 is a deficient number, since it is larger than the sum of its proper divisors (5722255).

18512945 is a wasteful number, since it uses less digits than its factorization.

18512945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336615.

The product of its digits is 14400, while the sum is 35.

The square root of 18512945 is about 4302.6671960541. The cubic root of 18512945 is about 264.5402971040.

The spelling of 18512945 in words is "eighteen million, five hundred twelve thousand, nine hundred forty-five".