23850821 has 2 divisors, whose sum is σ = 23850822. Its totient is φ = 23850820.

The previous prime is 23850803. The next prime is 23850823. The reversal of 23850821 is 12805832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 10962721 = 3590^2 + 3311^2 .

It is a cyclic number.

It is not a de Polignac number, because 23850821 - 2¹⁰ = 23849797 is a prime.

Together with 23850823, 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 (23850823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11925410 + 11925411.

It is an arithmetic number, because the mean of its divisors is an integer number (11925411).

Almost surely, 2^23850821 is an apocalyptic number.

It is an amenable number.

23850821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23850821 is an equidigital number, since it uses as much as digits as its factorization.

23850821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 23850821 is about 4883.7302341550. The cubic root of 23850821 is about 287.8510232914.

The spelling of 23850821 in words is "twenty-three million, eight hundred fifty thousand, eight hundred twenty-one".