18640298976 has 96 divisors (see below), whose sum is σ = 52726101120. Its totient is φ = 5732058624.

The previous prime is 18640298951. The next prime is 18640298987. The reversal of 18640298976 is 67989204681.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2795935 + ... + 2802593.

It is an arithmetic number, because the mean of its divisors is an integer number (549230220).

Almost surely, 2^18640298976 is an apocalyptic number.

18640298976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18640298976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26363050560).

18640298976 is an abundant number, since it is smaller than the sum of its proper divisors (34085802144).

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

18640298976 is a wasteful number, since it uses less digits than its factorization.

18640298976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8928 (or 8920 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 18640298976 in words is "eighteen billion, six hundred forty million, two hundred ninety-eight thousand, nine hundred seventy-six".