18626804199 has 16 divisors (see below), whose sum is σ = 28237017600. Its totient is φ = 12129081048.

The previous prime is 18626804191. The next prime is 18626804221. The reversal of 18626804199 is 99140862681.

18626804199 is a `hidden beast` number, since 1 + 8 + 626 + 8 + 0 + 4 + 1 + 9 + 9 = 666.

It is not a de Polignac number, because 18626804199 - 2³ = 18626804191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18626804191) 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, 8020719 + ... + 8023040.

It is an arithmetic number, because the mean of its divisors is an integer number (1764813600).

Almost surely, 2^18626804199 is an apocalyptic number.

18626804199 is a deficient number, since it is larger than the sum of its proper divisors (9610213401).

18626804199 is a wasteful number, since it uses less digits than its factorization.

18626804199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16043811 (or 16043805 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 18626804199 in words is "eighteen billion, six hundred twenty-six million, eight hundred four thousand, one hundred ninety-nine".