19431747472 has 30 divisors (see below), whose sum is σ = 38544989622. Its totient is φ = 9489908736.

The previous prime is 19431747451. The next prime is 19431747479. The reversal of 19431747472 is 27474713491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19314328576 + 117418896 = 138976^2 + 10836^2 .

It is not an unprimeable number, because it can be changed into a prime (19431747479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 298833 + ... + 358000.

Almost surely, 2^19431747472 is an apocalyptic number.

It is an amenable number.

19431747472 is a deficient number, since it is larger than the sum of its proper divisors (19113242150).

19431747472 is an equidigital number, since it uses as much as digits as its factorization.

19431747472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656927 (or 656878 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 49.

The spelling of 19431747472 in words is "nineteen billion, four hundred thirty-one million, seven hundred forty-seven thousand, four hundred seventy-two".