19668612 has 24 divisors (see below), whose sum is σ = 47476800. Its totient is φ = 6330016.

The previous prime is 19668599. The next prime is 19668613. The reversal of 19668612 is 21686691.

It is not an unprimeable number, because it can be changed into a prime (19668613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27912 + ... + 28607.

It is an arithmetic number, because the mean of its divisors is an integer number (1978200).

Almost surely, 2^19668612 is an apocalyptic number.

19668612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19668612 is an abundant number, since it is smaller than the sum of its proper divisors (27808188).

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

19668612 is a wasteful number, since it uses less digits than its factorization.

19668612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56555 (or 56553 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 19668612 is about 4434.9308901042. The cubic root of 19668612 is about 269.9341952116.

The spelling of 19668612 in words is "nineteen million, six hundred sixty-eight thousand, six hundred twelve".