20901233 has 2 divisors, whose sum is σ = 20901234. Its totient is φ = 20901232.

The previous prime is 20901217. The next prime is 20901241. The reversal of 20901233 is 33210902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 10195249 = 3272^2 + 3193^2 .

It is a cyclic number.

It is not a de Polignac number, because 20901233 - 2⁴ = 20901217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20906233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450616 + 10450617.

It is an arithmetic number, because the mean of its divisors is an integer number (10450617).

Almost surely, 2^20901233 is an apocalyptic number.

It is an amenable number.

20901233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20901233 is an equidigital number, since it uses as much as digits as its factorization.

20901233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20901233 is about 4571.7866310667. The cubic root of 20901233 is about 275.4592129148.

The spelling of 20901233 in words is "twenty million, nine hundred one thousand, two hundred thirty-three".