23585975921 has 2 divisors, whose sum is σ = 23585975922. Its totient is φ = 23585975920.

The previous prime is 23585975911. The next prime is 23585975947. The reversal of 23585975921 is 12957958532.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20886030400 + 2699945521 = 144520^2 + 51961^2 .

It is a cyclic number.

It is not a de Polignac number, because 23585975921 - 2¹⁸ = 23585713777 is a prime.

It is not a weakly prime, because it can be changed into another prime (23585975911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11792987960 + 11792987961.

It is an arithmetic number, because the mean of its divisors is an integer number (11792987961).

Almost surely, 2^23585975921 is an apocalyptic number.

It is an amenable number.

23585975921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23585975921 is an equidigital number, since it uses as much as digits as its factorization.

23585975921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804000, while the sum is 56.

The spelling of 23585975921 in words is "twenty-three billion, five hundred eighty-five million, nine hundred seventy-five thousand, nine hundred twenty-one".