23072617021 has 2 divisors, whose sum is σ = 23072617022. Its totient is φ = 23072617020.

The previous prime is 23072616979. The next prime is 23072617033. The reversal of 23072617021 is 12071627032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18136008900 + 4936608121 = 134670^2 + 70261^2 .

It is a cyclic number.

It is not a de Polignac number, because 23072617021 - 2⁹ = 23072616509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23072617921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11536308510 + 11536308511.

It is an arithmetic number, because the mean of its divisors is an integer number (11536308511).

Almost surely, 2^23072617021 is an apocalyptic number.

It is an amenable number.

23072617021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23072617021 is an equidigital number, since it uses as much as digits as its factorization.

23072617021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The spelling of 23072617021 in words is "twenty-three billion, seventy-two million, six hundred seventeen thousand, twenty-one".