23420501149 has 2 divisors, whose sum is σ = 23420501150. Its totient is φ = 23420501148.

The previous prime is 23420501077. The next prime is 23420501161. The reversal of 23420501149 is 94110502432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15748493049 + 7672008100 = 125493^2 + 87590^2 .

It is a cyclic number.

It is not a de Polignac number, because 23420501149 - 2²³ = 23412112541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23420501149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23420501189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710250574 + 11710250575.

It is an arithmetic number, because the mean of its divisors is an integer number (11710250575).

Almost surely, 2^23420501149 is an apocalyptic number.

It is an amenable number.

23420501149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23420501149 is an equidigital number, since it uses as much as digits as its factorization.

23420501149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 23420501149 in words is "twenty-three billion, four hundred twenty million, five hundred one thousand, one hundred forty-nine".