19930725680 has 40 divisors (see below), whose sum is σ = 46359233712. Its totient is φ = 7968798464.

The previous prime is 19930725677. The next prime is 19930725691. The reversal of 19930725680 is 8652703991.

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

It is a super-2 number, since 2×19930725680² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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, 133247 + ... + 240033.

Almost surely, 2^19930725680 is an apocalyptic number.

19930725680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19930725680 is an abundant number, since it is smaller than the sum of its proper divisors (26428508032).

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

19930725680 is a wasteful number, since it uses less digits than its factorization.

19930725680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109133 (or 109127 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 19930725680 in words is "nineteen billion, nine hundred thirty million, seven hundred twenty-five thousand, six hundred eighty".