18498932499 has 16 divisors (see below), whose sum is σ = 25763922432. Its totient is φ = 11784377088.

The previous prime is 18498932497. The next prime is 18498932509. The reversal of 18498932499 is 99423989481.

It is not a de Polignac number, because 18498932499 - 2¹ = 18498932497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18498932497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68542 + ... + 204195.

It is an arithmetic number, because the mean of its divisors is an integer number (1610245152).

Almost surely, 2^18498932499 is an apocalyptic number.

18498932499 is a deficient number, since it is larger than the sum of its proper divisors (7264989933).

18498932499 is a wasteful number, since it uses less digits than its factorization.

18498932499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273746.

The product of its digits is 40310784, while the sum is 66.

The spelling of 18498932499 in words is "eighteen billion, four hundred ninety-eight million, nine hundred thirty-two thousand, four hundred ninety-nine".