19238492979 has 28 divisors (see below), whose sum is σ = 28951279072. Its totient is φ = 12778203600.

The previous prime is 19238492947. The next prime is 19238492981. The reversal of 19238492979 is 97929483291.

It is not a de Polignac number, because 19238492979 - 2⁵ = 19238492947 is a prime.

It is a super-2 number, since 2×19238492979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19238492989) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 148869 + ... + 246249.

Almost surely, 2^19238492979 is an apocalyptic number.

19238492979 is a deficient number, since it is larger than the sum of its proper divisors (9712786093).

19238492979 is an frugal number, since it uses more digits than its factorization.

19238492979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97670 (or 97655 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 19238492979 in words is "nineteen billion, two hundred thirty-eight million, four hundred ninety-two thousand, nine hundred seventy-nine".