19985394 has 32 divisors (see below), whose sum is σ = 46960704. Its totient is φ = 5590080.

The previous prime is 19985351. The next prime is 19985401. The reversal of 19985394 is 49358991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10789 + ... + 12504.

It is an arithmetic number, because the mean of its divisors is an integer number (1467522).

Almost surely, 2^19985394 is an apocalyptic number.

19985394 is an abundant number, since it is smaller than the sum of its proper divisors (26975310).

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

19985394 is a wasteful number, since it uses less digits than its factorization.

19985394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322.

The product of its digits is 349920, while the sum is 48.

The square root of 19985394 is about 4470.5026563016. The cubic root of 19985394 is about 271.3756675945.

The spelling of 19985394 in words is "nineteen million, nine hundred eighty-five thousand, three hundred ninety-four".