23853018221 has 2 divisors, whose sum is σ = 23853018222. Its totient is φ = 23853018220.

The previous prime is 23853018173. The next prime is 23853018239. The reversal of 23853018221 is 12281035832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22123290121 + 1729728100 = 148739^2 + 41590^2 .

It is a cyclic number.

It is not a de Polignac number, because 23853018221 - 2¹⁰ = 23853017197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23852018221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11926509110 + 11926509111.

It is an arithmetic number, because the mean of its divisors is an integer number (11926509111).

Almost surely, 2^23853018221 is an apocalyptic number.

It is an amenable number.

23853018221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23853018221 is an equidigital number, since it uses as much as digits as its factorization.

23853018221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 23853018221 in words is "twenty-three billion, eight hundred fifty-three million, eighteen thousand, two hundred twenty-one".