18794964819856 has 45 divisors (see below), whose sum is σ = 38068161569179. Its totient is φ = 8988705464288.

The previous prime is 18794964819823. The next prime is 18794964819871. The reversal of 18794964819856 is 65891846949781.

The square root of 18794964819856 is 4335316.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 398825511 + ... + 398872633.

Almost surely, 2^{18794964819856} is an apocalyptic number.

18794964819856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18794964819856 is the 4335316-th square number.

It is an amenable number.

18794964819856 is an abundant number, since it is smaller than the sum of its proper divisors (19273196749323).

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

18794964819856 is an frugal number, since it uses more digits than its factorization.

18794964819856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94300 (or 47148 counting only the distinct ones).

The product of its digits is 7524679680, while the sum is 85.

The spelling of 18794964819856 in words is "eighteen trillion, seven hundred ninety-four billion, nine hundred sixty-four million, eight hundred nineteen thousand, eight hundred fifty-six".