19896795136 has 153 divisors (see below), whose sum is σ = 43496042421. Its totient is φ = 9099804672.

The previous prime is 19896795133. The next prime is 19896795169. The reversal of 19896795136 is 63159769891.

It is a happy number.

The square root of 19896795136 is 141056.

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., 10433396736 + 9463398400 = 102144^2 + 97280^2 .

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 (19896795133) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 686096370 + ... + 686096398.

Almost surely, 2^19896795136 is an apocalyptic number.

19896795136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19896795136 is the 141056-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19896795136

19896795136 is an abundant number, since it is smaller than the sum of its proper divisors (23599247285).

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

19896795136 is an frugal number, since it uses more digits than its factorization.

19896795136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 50 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 64.

Multiplying 19896795136 by its sum of digits (64), we get a square (1273394888704 = 1128448²).

19896795136 divided by its sum of digits (64) gives a square (310887424 = 17632²).

The spelling of 19896795136 in words is "nineteen billion, eight hundred ninety-six million, seven hundred ninety-five thousand, one hundred thirty-six".