19692419868 has 96 divisors (see below), whose sum is σ = 57201150720. Its totient is φ = 5806105920.

The previous prime is 19692419839. The next prime is 19692419909. The reversal of 19692419868 is 86891429691.

It is a super-2 number, since 2×19692419868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180046 + ... + 267957.

It is an arithmetic number, because the mean of its divisors is an integer number (595845320).

Almost surely, 2^19692419868 is an apocalyptic number.

19692419868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19692419868 is an abundant number, since it is smaller than the sum of its proper divisors (37508730852).

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

19692419868 is a wasteful number, since it uses less digits than its factorization.

19692419868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448064 (or 448056 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 63.

The spelling of 19692419868 in words is "nineteen billion, six hundred ninety-two million, four hundred nineteen thousand, eight hundred sixty-eight".