19486731172 has 6 divisors (see below), whose sum is σ = 34101779558. Its totient is φ = 9743365584.

The previous prime is 19486731107. The next prime is 19486731191. The reversal of 19486731172 is 27113768491.

It can be written as a sum of positive squares in only one way, i.e., 15771341056 + 3715390116 = 125584^2 + 60954^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2435841393 + ... + 2435841400.

Almost surely, 2^19486731172 is an apocalyptic number.

It is an amenable number.

19486731172 is a deficient number, since it is larger than the sum of its proper divisors (14615048386).

19486731172 is a wasteful number, since it uses less digits than its factorization.

19486731172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871682797 (or 4871682795 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The spelling of 19486731172 in words is "nineteen billion, four hundred eighty-six million, seven hundred thirty-one thousand, one hundred seventy-two".