19894312 has 32 divisors (see below), whose sum is σ = 38949120. Its totient is φ = 9515520.

The previous prime is 19894297. The next prime is 19894321. The reversal of 19894312 is 21349891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23643 + ... + 24469.

It is an arithmetic number, because the mean of its divisors is an integer number (1217160).

Almost surely, 2^19894312 is an apocalyptic number.

It is an amenable number.

19894312 is a deficient number, since it is larger than the sum of its proper divisors (19054808).

19894312 is a wasteful number, since it uses less digits than its factorization.

19894312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 957 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 19894312 is about 4460.3040255122. The cubic root of 19894312 is about 270.9627813431.

The spelling of 19894312 in words is "nineteen million, eight hundred ninety-four thousand, three hundred twelve".