18399807498 has 16 divisors (see below), whose sum is σ = 37089377280. Its totient is φ = 6084975456.

The previous prime is 18399807479. The next prime is 18399807527. The reversal of 18399807498 is 89470899381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12072603 + ... + 12074126.

It is an arithmetic number, because the mean of its divisors is an integer number (2318086080).

Almost surely, 2^18399807498 is an apocalyptic number.

18399807498 is an abundant number, since it is smaller than the sum of its proper divisors (18689569782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18399807498 is a wasteful number, since it uses less digits than its factorization.

18399807498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24146861.

The product of its (nonzero) digits is 31352832, while the sum is 66.

The spelling of 18399807498 in words is "eighteen billion, three hundred ninety-nine million, eight hundred seven thousand, four hundred ninety-eight".