19500560136 has 80 divisors (see below), whose sum is σ = 54667284540. Its totient is φ = 6494515200.

The previous prime is 19500560129. The next prime is 19500560197. The reversal of 19500560136 is 63106500591.

19500560136 is a `hidden beast` number, since 1 + 95 + 0 + 0 + 560 + 1 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14740388100 + 4760172036 = 121410^2 + 68994^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19500560136.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 765720 + ... + 790776.

Almost surely, 2^19500560136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19500560136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27333642270).

19500560136 is an abundant number, since it is smaller than the sum of its proper divisors (35166724404).

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

19500560136 is a wasteful number, since it uses less digits than its factorization.

19500560136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26276 (or 26263 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The spelling of 19500560136 in words is "nineteen billion, five hundred million, five hundred sixty thousand, one hundred thirty-six".