19713264 has 40 divisors (see below), whose sum is σ = 52115712. Its totient is φ = 6417600.

The previous prime is 19713263. The next prime is 19713299. The reversal of 19713264 is 46231791.

It is a super-2 number, since 2×19713264² = 777225555067392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19713263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712 + ... + 6839.

Almost surely, 2^19713264 is an apocalyptic number.

It is an amenable number.

19713264 is an abundant number, since it is smaller than the sum of its proper divisors (32402448).

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

19713264 is a wasteful number, since it uses less digits than its factorization.

19713264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605 (or 9599 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 19713264 is about 4439.9621620009. The cubic root of 19713264 is about 270.1383104811.

The spelling of 19713264 in words is "nineteen million, seven hundred thirteen thousand, two hundred sixty-four".