19963855156 has 12 divisors (see below), whose sum is σ = 39927710368. Its totient is φ = 8555937912.

The previous prime is 19963855151. The next prime is 19963855187. The reversal of 19963855156 is 65155836991.

19963855156 is an admirable number.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 19963855156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19963855151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356497386 + ... + 356497441.

Almost surely, 2^19963855156 is an apocalyptic number.

It is an amenable number.

19963855156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19963855156 is a wasteful number, since it uses less digits than its factorization.

19963855156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712994838 (or 712994836 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 58.

The spelling of 19963855156 in words is "nineteen billion, nine hundred sixty-three million, eight hundred fifty-five thousand, one hundred fifty-six".