19894868 has 12 divisors (see below), whose sum is σ = 39789792. Its totient is φ = 8526360.

The previous prime is 19894867. The next prime is 19894871. The reversal of 19894868 is 86849891.

19894868 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894867) 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, 355238 + ... + 355293.

It is an arithmetic number, because the mean of its divisors is an integer number (3315816).

Almost surely, 2^19894868 is an apocalyptic number.

It is an amenable number.

19894868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19894868 is a wasteful number, since it uses less digits than its factorization.

19894868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710542 (or 710540 counting only the distinct ones).

The product of its digits is 995328, while the sum is 53.

The square root of 19894868 is about 4460.3663526666. The cubic root of 19894868 is about 270.9653055806.

The spelling of 19894868 in words is "nineteen million, eight hundred ninety-four thousand, eight hundred sixty-eight".