18813559340 has 24 divisors (see below), whose sum is σ = 39915782592. Its totient is φ = 7447841280.

The previous prime is 18813559309. The next prime is 18813559357. The reversal of 18813559340 is 4395531881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4846916 + ... + 4850795.

It is an arithmetic number, because the mean of its divisors is an integer number (1663157608).

Almost surely, 2^18813559340 is an apocalyptic number.

18813559340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18813559340 is an abundant number, since it is smaller than the sum of its proper divisors (21102223252).

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

18813559340 is a wasteful number, since it uses less digits than its factorization.

18813559340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697817 (or 9697815 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 18813559340 in words is "eighteen billion, eight hundred thirteen million, five hundred fifty-nine thousand, three hundred forty".