18704391696 has 225 divisors, whose sum is σ = 56498323453. Its totient is φ = 5973851520.

The previous prime is 18704391649. The next prime is 18704391733. The reversal of 18704391696 is 69619340781.

The square root of 18704391696 is 136764.

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

It can be written as a sum of positive squares in only one way, i.e., 9808129296 + 8896262400 = 99036^2 + 94320^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 142781551 + ... + 142781681.

Almost surely, 2^18704391696 is an apocalyptic number.

18704391696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18704391696 is the 136764-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18704391696

18704391696 is an abundant number, since it is smaller than the sum of its proper divisors (37793931757).

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

18704391696 is an equidigital number, since it uses as much as digits as its factorization.

18704391696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 18704391696 in words is "eighteen billion, seven hundred four million, three hundred ninety-one thousand, six hundred ninety-six".