19386663696 has 135 divisors (see below), whose sum is σ = 55808519637. Its totient is φ = 6282328320.

The previous prime is 19386663679. The next prime is 19386663701. The reversal of 19386663696 is 69636668391.

The square root of 19386663696 is 139236.

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., 934158096 + 18452505600 = 30564^2 + 135840^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 68503971 + ... + 68504253.

Almost surely, 2^19386663696 is an apocalyptic number.

19386663696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19386663696 is the 139236-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19386663696

19386663696 is an abundant number, since it is smaller than the sum of its proper divisors (36421855941).

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

19386663696 is an equidigital number, since it uses as much as digits as its factorization.

19386663696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 329 counting only the distinct ones).

The product of its digits is 45349632, while the sum is 63.

The spelling of 19386663696 in words is "nineteen billion, three hundred eighty-six million, six hundred sixty-three thousand, six hundred ninety-six".