18499955 has 8 divisors (see below), whose sum is σ = 22289904. Its totient is φ = 14740000.

The previous prime is 18499931. The next prime is 18500017. The reversal of 18499955 is 55999481.

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

It is not a de Polignac number, because 18499955 - 2⁸ = 18499699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6116 + ... + 8625.

It is an arithmetic number, because the mean of its divisors is an integer number (2786238).

Almost surely, 2^18499955 is an apocalyptic number.

18499955 is a deficient number, since it is larger than the sum of its proper divisors (3789949).

18499955 is a wasteful number, since it uses less digits than its factorization.

18499955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14997.

The product of its digits is 583200, while the sum is 50.

The square root of 18499955 is about 4301.1574023744. The cubic root of 18499955 is about 264.4784091924.

The spelling of 18499955 in words is "eighteen million, four hundred ninety-nine thousand, nine hundred fifty-five".