18799694464 has 64 divisors (see below), whose sum is σ = 38076192000. Its totient is φ = 9244265472.

The previous prime is 18799694461. The next prime is 18799694513. The reversal of 18799694464 is 46449699781.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 18799694464.

It is not an unprimeable number, because it can be changed into a prime (18799694461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2655922 + ... + 2662990.

It is an arithmetic number, because the mean of its divisors is an integer number (594940500).

Almost surely, 2^18799694464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18799694464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19038096000).

18799694464 is an abundant number, since it is smaller than the sum of its proper divisors (19276497536).

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

18799694464 is an equidigital number, since it uses as much as digits as its factorization.

18799694464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7425 (or 7413 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 67.

The spelling of 18799694464 in words is "eighteen billion, seven hundred ninety-nine million, six hundred ninety-four thousand, four hundred sixty-four".