19961868 has 24 divisors (see below), whose sum is σ = 46661440. Its totient is φ = 6642000.

The previous prime is 19961857. The next prime is 19961873. The reversal of 19961868 is 86816991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7743 + ... + 9993.

Almost surely, 2^19961868 is an apocalyptic number.

It is an amenable number.

19961868 is an abundant number, since it is smaller than the sum of its proper divisors (26699572).

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

19961868 is a wasteful number, since it uses less digits than its factorization.

19961868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997 (or 2995 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 19961868 is about 4467.8706337583. The cubic root of 19961868 is about 271.2691416196.

The spelling of 19961868 in words is "nineteen million, nine hundred sixty-one thousand, eight hundred sixty-eight".