19885994 has 8 divisors (see below), whose sum is σ = 29879040. Its totient is φ = 9926316.

The previous prime is 19885979. The next prime is 19885997. The reversal of 19885994 is 49958891.

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

It is not an unprimeable number, because it can be changed into a prime (19885997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6794 + ... + 9269.

It is an arithmetic number, because the mean of its divisors is an integer number (3734880).

Almost surely, 2^19885994 is an apocalyptic number.

19885994 is a deficient number, since it is larger than the sum of its proper divisors (9993046).

19885994 is a wasteful number, since it uses less digits than its factorization.

19885994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16684.

The product of its digits is 933120, while the sum is 53.

The square root of 19885994 is about 4459.3714803770. The cubic root of 19885994 is about 270.9250120449.

The spelling of 19885994 in words is "nineteen million, eight hundred eighty-five thousand, nine hundred ninety-four".