23947203517 has 4 divisors (see below), whose sum is σ = 24094119040. Its totient is φ = 23800287996.

The previous prime is 23947203481. The next prime is 23947203541. The reversal of 23947203517 is 71530274932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23947203517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23947203817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73457517 + ... + 73457842.

It is an arithmetic number, because the mean of its divisors is an integer number (6023529760).

Almost surely, 2^23947203517 is an apocalyptic number.

It is an amenable number.

23947203517 is a deficient number, since it is larger than the sum of its proper divisors (146915523).

23947203517 is a wasteful number, since it uses less digits than its factorization.

23947203517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146915522.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 23947203517 in words is "twenty-three billion, nine hundred forty-seven million, two hundred three thousand, five hundred seventeen".