23521613953 has 2 divisors, whose sum is σ = 23521613954. Its totient is φ = 23521613952.

The previous prime is 23521613923. The next prime is 23521614029. The reversal of 23521613953 is 35931612532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12076251664 + 11445362289 = 109892^2 + 106983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23521613953 is a prime.

It is not a weakly prime, because it can be changed into another prime (23521613923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760806976 + 11760806977.

It is an arithmetic number, because the mean of its divisors is an integer number (11760806977).

Almost surely, 2^23521613953 is an apocalyptic number.

It is an amenable number.

23521613953 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521613953 is an equidigital number, since it uses as much as digits as its factorization.

23521613953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 40.

The spelling of 23521613953 in words is "twenty-three billion, five hundred twenty-one million, six hundred thirteen thousand, nine hundred fifty-three".