18038799 has 12 divisors (see below), whose sum is σ = 26325936. Its totient is φ = 11901312.

The previous prime is 18038791. The next prime is 18038803. The reversal of 18038799 is 99783081.

18038799 is a `hidden beast` number, since 180 + 387 + 99 = 666.

It is not a de Polignac number, because 18038799 - 2³ = 18038791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9459 + ... + 11204.

It is an arithmetic number, because the mean of its divisors is an integer number (2193828).

Almost surely, 2^18038799 is an apocalyptic number.

18038799 is a deficient number, since it is larger than the sum of its proper divisors (8287137).

18038799 is a wasteful number, since it uses less digits than its factorization.

18038799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20766 (or 20763 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 18038799 is about 4247.2107317627. The cubic root of 18038799 is about 262.2623045581.

The spelling of 18038799 in words is "eighteen million, thirty-eight thousand, seven hundred ninety-nine".