23520691081 has 2 divisors, whose sum is σ = 23520691082. Its totient is φ = 23520691080.

The previous prime is 23520691057. The next prime is 23520691091. The reversal of 23520691081 is 18019602532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22964674681 + 556016400 = 151541^2 + 23580^2 .

It is a cyclic number.

It is not a de Polignac number, because 23520691081 - 2⁹ = 23520690569 is a prime.

It is a super-2 number, since 2×23520691081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23520691081.

It is not a weakly prime, because it can be changed into another prime (23520691001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760345540 + 11760345541.

It is an arithmetic number, because the mean of its divisors is an integer number (11760345541).

Almost surely, 2^23520691081 is an apocalyptic number.

It is an amenable number.

23520691081 is a deficient number, since it is larger than the sum of its proper divisors (1).

23520691081 is an equidigital number, since it uses as much as digits as its factorization.

23520691081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 23520691081 in words is "twenty-three billion, five hundred twenty million, six hundred ninety-one thousand, eighty-one".