23420501189 has 2 divisors, whose sum is σ = 23420501190. Its totient is φ = 23420501188.

The previous prime is 23420501161. The next prime is 23420501191. The reversal of 23420501189 is 98110502432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20985868225 + 2434632964 = 144865^2 + 49342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23420501189 is a prime.

Together with 23420501191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23420501149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710250594 + 11710250595.

It is an arithmetic number, because the mean of its divisors is an integer number (11710250595).

Almost surely, 2^23420501189 is an apocalyptic number.

It is an amenable number.

23420501189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23420501189 is an equidigital number, since it uses as much as digits as its factorization.

23420501189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 23420501189 in words is "twenty-three billion, four hundred twenty million, five hundred one thousand, one hundred eighty-nine".