19421000560 has 80 divisors (see below), whose sum is σ = 49353153696. Its totient is φ = 7063778304.

The previous prime is 19421000531. The next prime is 19421000563. The reversal of 19421000560 is 6500012491.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19421000563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69679 + ... + 209038.

Almost surely, 2^19421000560 is an apocalyptic number.

19421000560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19421000560 is the 69680-th decagonal number.

It is an amenable number.

19421000560 is an abundant number, since it is smaller than the sum of its proper divisors (29932153136).

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

19421000560 is a wasteful number, since it uses less digits than its factorization.

19421000560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278810 (or 278804 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 19421000560 in words is "nineteen billion, four hundred twenty-one million, five hundred sixty", and thus it is an aban number.