23253821 has 2 divisors, whose sum is σ = 23253822. Its totient is φ = 23253820.

The previous prime is 23253817. The next prime is 23253823. The reversal of 23253821 is 12835232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 10329796 = 3595^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 23253821 - 2² = 23253817 is a prime.

It is a super-2 number, since 2×23253821² = 1081480382200082, which contains 22 as substring.

Together with 23253823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23253823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11626910 + 11626911.

It is an arithmetic number, because the mean of its divisors is an integer number (11626911).

Almost surely, 2^23253821 is an apocalyptic number.

It is an amenable number.

23253821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23253821 is an equidigital number, since it uses as much as digits as its factorization.

23253821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 23253821 is about 4822.2215834613. The cubic root of 23253821 is about 285.4290081461.

The spelling of 23253821 in words is "twenty-three million, two hundred fifty-three thousand, eight hundred twenty-one".