19948664 has 16 divisors (see below), whose sum is σ = 37498920. Its totient is φ = 9948960.

The previous prime is 19948639. The next prime is 19948679. The reversal of 19948664 is 46684991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407 + ... + 6329.

Almost surely, 2^19948664 is an apocalyptic number.

It is an amenable number.

19948664 is a deficient number, since it is larger than the sum of its proper divisors (17550256).

19948664 is a wasteful number, since it uses less digits than its factorization.

19948664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6350 (or 6346 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 19948664 is about 4466.3927279181. The cubic root of 19948664 is about 271.2093170951.

The spelling of 19948664 in words is "nineteen million, nine hundred forty-eight thousand, six hundred sixty-four".