18669099 has 16 divisors (see below), whose sum is σ = 25850880. Its totient is φ = 11971680.

The previous prime is 18669073. The next prime is 18669103. The reversal of 18669099 is 99096681.

It is not a de Polignac number, because 18669099 - 2⁵ = 18669067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18669029) 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, 17812 + ... + 18830.

It is an arithmetic number, because the mean of its divisors is an integer number (1615680).

Almost surely, 2^18669099 is an apocalyptic number.

18669099 is a deficient number, since it is larger than the sum of its proper divisors (7181781).

18669099 is a wasteful number, since it uses less digits than its factorization.

18669099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 18669099 is about 4320.7752776556. The cubic root of 18669099 is about 265.2820019230.

The spelling of 18669099 in words is "eighteen million, six hundred sixty-nine thousand, ninety-nine".