23540025521 has 2 divisors, whose sum is σ = 23540025522. Its totient is φ = 23540025520.

The previous prime is 23540025503. The next prime is 23540025527. The reversal of 23540025521 is 12552004532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12674256400 + 10865769121 = 112580^2 + 104239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23540025521 is a prime.

It is not a weakly prime, because it can be changed into another prime (23540025527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11770012760 + 11770012761.

It is an arithmetic number, because the mean of its divisors is an integer number (11770012761).

Almost surely, 2^23540025521 is an apocalyptic number.

It is an amenable number.

23540025521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23540025521 is an equidigital number, since it uses as much as digits as its factorization.

23540025521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 23540025521 in words is "twenty-three billion, five hundred forty million, twenty-five thousand, five hundred twenty-one".