18700899 has 12 divisors (see below), whose sum is σ = 29005704. Its totient is φ = 10686144.

The previous prime is 18700889. The next prime is 18700907. The reversal of 18700899 is 99800781.

It is not a de Polignac number, because 18700899 - 2²⁴ = 1923683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18700899.

It is not an unprimeable number, because it can be changed into a prime (18700819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63462 + ... + 63755.

It is an arithmetic number, because the mean of its divisors is an integer number (2417142).

Almost surely, 2^18700899 is an apocalyptic number.

18700899 is a deficient number, since it is larger than the sum of its proper divisors (10304805).

18700899 is a wasteful number, since it uses less digits than its factorization.

18700899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127234 (or 127227 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 18700899 is about 4324.4536071046. The cubic root of 18700899 is about 265.4325391358.

The spelling of 18700899 in words is "eighteen million, seven hundred thousand, eight hundred ninety-nine".