18696733696 has 33 divisors (see below), whose sum is σ = 37383957741. Its totient is φ = 9346179072.

The previous prime is 18696733681. The next prime is 18696733697. The reversal of 18696733696 is 69633769681.

The square root of 18696733696 is 136736.

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., 5069440000 + 13627293696 = 71200^2 + 116736^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18696733697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4373416 + ... + 4377688.

Almost surely, 2^18696733696 is an apocalyptic number.

18696733696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18696733696 is the 136736-th square number.

It is an amenable number.

18696733696 is a deficient number, since it is larger than the sum of its proper divisors (18687224045).

18696733696 is an frugal number, since it uses more digits than its factorization.

18696733696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566 (or 4275 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 64.

Multiplying 18696733696 by its sum of digits (64), we get a square (1196590956544 = 1093888²).

18696733696 divided by its sum of digits (64) gives a square (292136464 = 17092²).

The spelling of 18696733696 in words is "eighteen billion, six hundred ninety-six million, seven hundred thirty-three thousand, six hundred ninety-six".