18740799816 has 32 divisors (see below), whose sum is σ = 47139444960. Its totient is φ = 6208607232.

The previous prime is 18740799767. The next prime is 18740799823. The reversal of 18740799816 is 61899704781.

It is a self number, because there is not a number n which added to its sum of digits gives 18740799816.

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, 2391385 + ... + 2399208.

It is an arithmetic number, because the mean of its divisors is an integer number (1473107655).

Almost surely, 2^18740799816 is an apocalyptic number.

It is an amenable number.

18740799816 is an abundant number, since it is smaller than the sum of its proper divisors (28398645144).

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

18740799816 is a wasteful number, since it uses less digits than its factorization.

18740799816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790765 (or 4790761 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 60.

The spelling of 18740799816 in words is "eighteen billion, seven hundred forty million, seven hundred ninety-nine thousand, eight hundred sixteen".