19431568458 has 12 divisors (see below), whose sum is σ = 42101731698. Its totient is φ = 6477189480.

The previous prime is 19431568447. The next prime is 19431568477. The reversal of 19431568458 is 85486513491.

It is a happy number.

19431568458 is a `hidden beast` number, since 1 + 9 + 4 + 31 + 568 + 45 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10798742889 + 8632825569 = 103917^2 + 92913^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539765773 + ... + 539765808.

Almost surely, 2^19431568458 is an apocalyptic number.

19431568458 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19431568458 is an abundant number, since it is smaller than the sum of its proper divisors (22670163240).

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

19431568458 is a wasteful number, since it uses less digits than its factorization.

19431568458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079531589 (or 1079531586 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 19431568458 in words is "nineteen billion, four hundred thirty-one million, five hundred sixty-eight thousand, four hundred fifty-eight".