23421431489 has 2 divisors, whose sum is σ = 23421431490. Its totient is φ = 23421431488.

The previous prime is 23421431477. The next prime is 23421431491. The reversal of 23421431489 is 98413412432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16159494400 + 7261937089 = 127120^2 + 85217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23421431489 is a prime.

Together with 23421431491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23421431389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710715744 + 11710715745.

It is an arithmetic number, because the mean of its divisors is an integer number (11710715745).

Almost surely, 2^23421431489 is an apocalyptic number.

It is an amenable number.

23421431489 is a deficient number, since it is larger than the sum of its proper divisors (1).

23421431489 is an equidigital number, since it uses as much as digits as its factorization.

23421431489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The spelling of 23421431489 in words is "twenty-three billion, four hundred twenty-one million, four hundred thirty-one thousand, four hundred eighty-nine".