18013799784 has 32 divisors (see below), whose sum is σ = 45039708000. Its totient is φ = 6003905472.

The previous prime is 18013799717. The next prime is 18013799803. The reversal of 18013799784 is 48799731081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195202 + ... + 272270.

It is an arithmetic number, because the mean of its divisors is an integer number (1407490875).

Almost surely, 2^18013799784 is an apocalyptic number.

It is an amenable number.

18013799784 is an abundant number, since it is smaller than the sum of its proper divisors (27025908216).

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

18013799784 is a wasteful number, since it uses less digits than its factorization.

18013799784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86817 (or 86813 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 18013799784 in words is "eighteen billion, thirteen million, seven hundred ninety-nine thousand, seven hundred eighty-four".