23209601533 has 2 divisors, whose sum is σ = 23209601534. Its totient is φ = 23209601532.

The previous prime is 23209601497. The next prime is 23209601551. The reversal of 23209601533 is 33510690232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20112345124 + 3097256409 = 141818^2 + 55653^2 .

It is a cyclic number.

It is not a de Polignac number, because 23209601533 - 2²⁵ = 23176047101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23209601593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11604800766 + 11604800767.

It is an arithmetic number, because the mean of its divisors is an integer number (11604800767).

Almost surely, 2^23209601533 is an apocalyptic number.

It is an amenable number.

23209601533 is a deficient number, since it is larger than the sum of its proper divisors (1).

23209601533 is an equidigital number, since it uses as much as digits as its factorization.

23209601533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The spelling of 23209601533 in words is "twenty-three billion, two hundred nine million, six hundred one thousand, five hundred thirty-three".