23645013421 has 4 divisors (see below), whose sum is σ = 23648237344. Its totient is φ = 23641789500.

The previous prime is 23645013317. The next prime is 23645013433. The reversal of 23645013421 is 12431054632.

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-23645013421 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 (23645013121) 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, 1600935 + ... + 1615636.

It is an arithmetic number, because the mean of its divisors is an integer number (5912059336).

Almost surely, 2^23645013421 is an apocalyptic number.

It is an amenable number.

23645013421 is a deficient number, since it is larger than the sum of its proper divisors (3223923).

23645013421 is an equidigital number, since it uses as much as digits as its factorization.

23645013421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223922.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 23645013421 in words is "twenty-three billion, six hundred forty-five million, thirteen thousand, four hundred twenty-one".