19213696872 has 24 divisors (see below), whose sum is σ = 52037095890. Its totient is φ = 6404565600.

The previous prime is 19213696849. The next prime is 19213696891. The reversal of 19213696872 is 27869631291.

It can be written as a sum of positive squares in only one way, i.e., 18081105156 + 1132591716 = 134466^2 + 33654^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-5 number, since 5×19213696872⁵ (a number of 53 digits) contains 55555 as substring. Note that it is a super-d number also for d = 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, 133428379 + ... + 133428522.

Almost surely, 2^19213696872 is an apocalyptic number.

19213696872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19213696872 is an abundant number, since it is smaller than the sum of its proper divisors (32823399018).

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

19213696872 is a wasteful number, since it uses less digits than its factorization.

19213696872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266856913 (or 266856906 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 19213696872 in words is "nineteen billion, two hundred thirteen million, six hundred ninety-six thousand, eight hundred seventy-two".