23425983421 has 2 divisors, whose sum is σ = 23425983422. Its totient is φ = 23425983420.

The previous prime is 23425983401. The next prime is 23425983439. The reversal of 23425983421 is 12438952432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16922367396 + 6503616025 = 130086^2 + 80645^2 .

It is a cyclic number.

It is not a de Polignac number, because 23425983421 - 2⁵ = 23425983389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23425983401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11712991710 + 11712991711.

It is an arithmetic number, because the mean of its divisors is an integer number (11712991711).

Almost surely, 2^23425983421 is an apocalyptic number.

It is an amenable number.

23425983421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23425983421 is an equidigital number, since it uses as much as digits as its factorization.

23425983421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The spelling of 23425983421 in words is "twenty-three billion, four hundred twenty-five million, nine hundred eighty-three thousand, four hundred twenty-one".