23720452507643 has 4 divisors (see below), whose sum is σ = 23720586885528. Its totient is φ = 23720318129760.

The previous prime is 23720452507639. The next prime is 23720452507651. The reversal of 23720452507643 is 34670525402732.

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

It is a cyclic number.

It is not a de Polignac number, because 23720452507643 - 2² = 23720452507639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23720452507591 and 23720452507600.

It is not an unprimeable number, because it can be changed into a prime (23720452507343) 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, 66923813 + ... + 67277318.

It is an arithmetic number, because the mean of its divisors is an integer number (5930146721382).

Almost surely, 2^{23720452507643} is an apocalyptic number.

23720452507643 is a deficient number, since it is larger than the sum of its proper divisors (134377885).

23720452507643 is a wasteful number, since it uses less digits than its factorization.

23720452507643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134377884.

The product of its (nonzero) digits is 8467200, while the sum is 50.

The spelling of 23720452507643 in words is "twenty-three trillion, seven hundred twenty billion, four hundred fifty-two million, five hundred seven thousand, six hundred forty-three".