19516533504 has 144 divisors (see below), whose sum is σ = 56178931200. Its totient is φ = 5979230208.

The previous prime is 19516533481. The next prime is 19516533521. The reversal of 19516533504 is 40533561591.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2382087 + ... + 2390265.

Almost surely, 2^19516533504 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 19516533504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28089465600).

19516533504 is an abundant number, since it is smaller than the sum of its proper divisors (36662397696).

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

19516533504 is a wasteful number, since it uses less digits than its factorization.

19516533504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450 (or 8436 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 19516533504 in words is "nineteen billion, five hundred sixteen million, five hundred thirty-three thousand, five hundred four".