19731039460 has 48 divisors (see below), whose sum is σ = 47860968960. Its totient is φ = 6752867840.

The previous prime is 19731039451. The next prime is 19731039491. The reversal of 19731039460 is 6493013791.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2634100 + ... + 2641579.

It is an arithmetic number, because the mean of its divisors is an integer number (997103520).

Almost surely, 2^19731039460 is an apocalyptic number.

19731039460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19731039460 is an abundant number, since it is smaller than the sum of its proper divisors (28129929500).

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

19731039460 is a wasteful number, since it uses less digits than its factorization.

19731039460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275716 (or 5275714 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 19731039460 in words is "nineteen billion, seven hundred thirty-one million, thirty-nine thousand, four hundred sixty".