19713229565 has 16 divisors (see below), whose sum is σ = 24141931200. Its totient is φ = 15448438272.

The previous prime is 19713229511. The next prime is 19713229583. The reversal of 19713229565 is 56592231791.

It is a cyclic number.

It is not a de Polignac number, because 19713229565 - 2¹⁴ = 19713213181 is a prime.

It is a super-2 number, since 2×19713229565² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 34580 + ... + 201549.

It is an arithmetic number, because the mean of its divisors is an integer number (1508870700).

Almost surely, 2^19713229565 is an apocalyptic number.

It is an amenable number.

19713229565 is a deficient number, since it is larger than the sum of its proper divisors (4428701635).

19713229565 is a wasteful number, since it uses less digits than its factorization.

19713229565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236476.

The product of its digits is 1020600, while the sum is 50.

The spelling of 19713229565 in words is "nineteen billion, seven hundred thirteen million, two hundred twenty-nine thousand, five hundred sixty-five".