18539449299 has 48 divisors (see below), whose sum is σ = 32218348032. Its totient is φ = 10043599104.

The previous prime is 18539449261. The next prime is 18539449301. The reversal of 18539449299 is 99294493581.

18539449299 is a `hidden beast` number, since 1 + 8 + 53 + 9 + 4 + 492 + 99 = 666.

It is not a de Polignac number, because 18539449299 - 2²⁰ = 18538400723 is a prime.

It is a super-2 number, since 2×18539449299² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18539449499) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107124 + ... + 220350.

It is an arithmetic number, because the mean of its divisors is an integer number (671215584).

Almost surely, 2^18539449299 is an apocalyptic number.

18539449299 is a deficient number, since it is larger than the sum of its proper divisors (13678898733).

18539449299 is a wasteful number, since it uses less digits than its factorization.

18539449299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113376 (or 113373 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The spelling of 18539449299 in words is "eighteen billion, five hundred thirty-nine million, four hundred forty-nine thousand, two hundred ninety-nine".