18889465 has 32 divisors (see below), whose sum is σ = 27993600. Its totient is φ = 11940864.

The previous prime is 18889457. The next prime is 18889471. The reversal of 18889465 is 56498881.

It is a cyclic number.

It is not a de Polignac number, because 18889465 - 2³ = 18889457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31236 + ... + 31834.

It is an arithmetic number, because the mean of its divisors is an integer number (874800).

Almost surely, 2^18889465 is an apocalyptic number.

It is an amenable number.

18889465 is a deficient number, since it is larger than the sum of its proper divisors (9104135).

18889465 is a wasteful number, since it uses less digits than its factorization.

18889465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its digits is 552960, while the sum is 49.

The square root of 18889465 is about 4346.2012148542. The cubic root of 18889465 is about 266.3216988974.

The spelling of 18889465 in words is "eighteen million, eight hundred eighty-nine thousand, four hundred sixty-five".