19513500552 has 96 divisors (see below), whose sum is σ = 65045023680. Its totient is φ = 5146416000.

The previous prime is 19513500551. The next prime is 19513500581. The reversal of 19513500552 is 25500531591.

19513500552 is a `hidden beast` number, since 1 + 9 + 51 + 3 + 50 + 0 + 552 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (19513500551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1482574 + ... + 1495677.

It is an arithmetic number, because the mean of its divisors is an integer number (677552330).

Almost surely, 2^19513500552 is an apocalyptic number.

19513500552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19513500552 is an abundant number, since it is smaller than the sum of its proper divisors (45531523128).

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

19513500552 is a wasteful number, since it uses less digits than its factorization.

19513500552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2978283 (or 2978276 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The spelling of 19513500552 in words is "nineteen billion, five hundred thirteen million, five hundred thousand, five hundred fifty-two".