19994668 has 6 divisors (see below), whose sum is σ = 34990676. Its totient is φ = 9997332.

The previous prime is 19994657. The next prime is 19994701. The reversal of 19994668 is 86649991.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499330 + ... + 2499337.

Almost surely, 2^19994668 is an apocalyptic number.

It is an amenable number.

19994668 is a deficient number, since it is larger than the sum of its proper divisors (14996008).

19994668 is a wasteful number, since it uses less digits than its factorization.

19994668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998671 (or 4998669 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 19994668 is about 4471.5397795390. The cubic root of 19994668 is about 271.4176373910.

The spelling of 19994668 in words is "nineteen million, nine hundred ninety-four thousand, six hundred sixty-eight".