19913164 has 6 divisors (see below), whose sum is σ = 34848044. Its totient is φ = 9956580.

The previous prime is 19913119. The next prime is 19913177. The reversal of 19913164 is 46131991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2489142 + ... + 2489149.

Almost surely, 2^19913164 is an apocalyptic number.

It is an amenable number.

19913164 is a deficient number, since it is larger than the sum of its proper divisors (14934880).

19913164 is a wasteful number, since it uses less digits than its factorization.

19913164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978295 (or 4978293 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 19913164 is about 4462.4168339589. The cubic root of 19913164 is about 271.0483431138.

The spelling of 19913164 in words is "nineteen million, nine hundred thirteen thousand, one hundred sixty-four".