19994572 has 24 divisors (see below), whose sum is σ = 38984400. Its totient is φ = 8909376.

The previous prime is 19994561. The next prime is 19994581. The reversal of 19994572 is 27549991.

It is a happy number.

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, 5122 + ... + 8137.

It is an arithmetic number, because the mean of its divisors is an integer number (1624350).

Almost surely, 2^19994572 is an apocalyptic number.

It is an amenable number.

19994572 is a deficient number, since it is larger than the sum of its proper divisors (18989828).

19994572 is a wasteful number, since it uses less digits than its factorization.

19994572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13305 (or 13303 counting only the distinct ones).

The product of its digits is 204120, while the sum is 46.

The square root of 19994572 is about 4471.5290449688. The cubic root of 19994572 is about 271.4172030062.

The spelling of 19994572 in words is "nineteen million, nine hundred ninety-four thousand, five hundred seventy-two".