23720910497 has 4 divisors (see below), whose sum is σ = 24168474900. Its totient is φ = 23273346096.

The previous prime is 23720910463. The next prime is 23720910511. The reversal of 23720910497 is 79401902732.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19098134416 + 4622776081 = 138196^2 + 67991^2 .

It is a cyclic number.

It is not a de Polignac number, because 23720910497 - 2¹⁸ = 23720648353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23720915497) 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, 223782122 + ... + 223782227.

It is an arithmetic number, because the mean of its divisors is an integer number (6042118725).

Almost surely, 2^23720910497 is an apocalyptic number.

It is an amenable number.

23720910497 is a deficient number, since it is larger than the sum of its proper divisors (447564403).

23720910497 is an equidigital number, since it uses as much as digits as its factorization.

23720910497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447564402.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 23720910497 in words is "twenty-three billion, seven hundred twenty million, nine hundred ten thousand, four hundred ninety-seven".