19994685 has 8 divisors (see below), whose sum is σ = 31991520. Its totient is φ = 10663824.

The previous prime is 19994657. The next prime is 19994701. The reversal of 19994685 is 58649991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19994685 - 2¹⁰ = 19993661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666475 + ... + 666504.

It is an arithmetic number, because the mean of its divisors is an integer number (3998940).

Almost surely, 2^19994685 is an apocalyptic number.

19994685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19994685 is a deficient number, since it is larger than the sum of its proper divisors (11996835).

19994685 is a wasteful number, since it uses less digits than its factorization.

19994685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332987.

The product of its digits is 699840, while the sum is 51.

The square root of 19994685 is about 4471.5416804498. The cubic root of 19994685 is about 271.4177143131.

The spelling of 19994685 in words is "nineteen million, nine hundred ninety-four thousand, six hundred eighty-five".