23000165506921 has 2 divisors, whose sum is σ = 23000165506922. Its totient is φ = 23000165506920.

The previous prime is 23000165506817. The next prime is 23000165506957. The reversal of 23000165506921 is 12960556100032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14534858876521 + 8465306630400 = 3812461^2 + 2909520^2 .

It is a cyclic number.

It is not a de Polignac number, because 23000165506921 - 2⁴³ = 14204072484713 is a prime.

It is a super-2 number, since 2×23000165506921² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23000165506961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11500082753460 + 11500082753461.

It is an arithmetic number, because the mean of its divisors is an integer number (11500082753461).

Almost surely, 2^{23000165506921} is an apocalyptic number.

It is an amenable number.

23000165506921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23000165506921 is an equidigital number, since it uses as much as digits as its factorization.

23000165506921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 23000165506921 in words is "twenty-three trillion, one hundred sixty-five million, five hundred six thousand, nine hundred twenty-one".