19238974881 has 16 divisors (see below), whose sum is σ = 29324505984. Its totient is φ = 10990710144.

The previous prime is 19238974861. The next prime is 19238974907. The reversal of 19238974881 is 18847983291.

It is not a de Polignac number, because 19238974881 - 2¹⁰ = 19238973857 is a prime.

It is a super-2 number, since 2×19238974881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19238974861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44316 + ... + 201101.

It is an arithmetic number, because the mean of its divisors is an integer number (1832781624).

Almost surely, 2^19238974881 is an apocalyptic number.

It is an amenable number.

19238974881 is a deficient number, since it is larger than the sum of its proper divisors (10085531103).

19238974881 is a wasteful number, since it uses less digits than its factorization.

19238974881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249160.

The product of its digits is 6967296, while the sum is 60.

The spelling of 19238974881 in words is "nineteen billion, two hundred thirty-eight million, nine hundred seventy-four thousand, eight hundred eighty-one".