18797013408 has 24 divisors (see below), whose sum is σ = 49342160448. Its totient is φ = 6265671104.

The previous prime is 18797013377. The next prime is 18797013409. The reversal of 18797013408 is 80431079781.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (18797013409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 97901016 + ... + 97901207.

It is an arithmetic number, because the mean of its divisors is an integer number (2055923352).

Almost surely, 2^18797013408 is an apocalyptic number.

It is an amenable number.

18797013408 is an abundant number, since it is smaller than the sum of its proper divisors (30545147040).

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

18797013408 is a wasteful number, since it uses less digits than its factorization.

18797013408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195802236 (or 195802228 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 18797013408 in words is "eighteen billion, seven hundred ninety-seven million, thirteen thousand, four hundred eight".