19731029724 has 72 divisors (see below), whose sum is σ = 58164069600. Its totient is φ = 5637433536.

The previous prime is 19731029671. The next prime is 19731029737. The reversal of 19731029724 is 42792013791.

It is a self number, because there is not a number n which added to its sum of digits gives 19731029724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786609 + ... + 811304.

It is an arithmetic number, because the mean of its divisors is an integer number (807834300).

Almost surely, 2^19731029724 is an apocalyptic number.

19731029724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19731029724 is an abundant number, since it is smaller than the sum of its proper divisors (38433039876).

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

19731029724 is a wasteful number, since it uses less digits than its factorization.

19731029724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597944 (or 1597925 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 19731029724 in words is "nineteen billion, seven hundred thirty-one million, twenty-nine thousand, seven hundred twenty-four".