19520268720 has 40 divisors (see below), whose sum is σ = 60512833776. Its totient is φ = 5205404928.

The previous prime is 19520268709. The next prime is 19520268727. The reversal of 19520268720 is 2786202591.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (19520268727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40666987 + ... + 40667466.

Almost surely, 2^19520268720 is an apocalyptic number.

19520268720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19520268720 is an abundant number, since it is smaller than the sum of its proper divisors (40992565056).

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

19520268720 is a wasteful number, since it uses less digits than its factorization.

19520268720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81334469 (or 81334463 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 19520268720 in words is "nineteen billion, five hundred twenty million, two hundred sixty-eight thousand, seven hundred twenty".