22821839 has 2 divisors, whose sum is σ = 22821840. Its totient is φ = 22821838.

The previous prime is 22821817. The next prime is 22821847. The reversal of 22821839 is 93812822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22821839 - 2⁸ = 22821583 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22821799 and 22821808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22821809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11410919 + 11410920.

It is an arithmetic number, because the mean of its divisors is an integer number (11410920).

Almost surely, 2^22821839 is an apocalyptic number.

22821839 is a deficient number, since it is larger than the sum of its proper divisors (1).

22821839 is an equidigital number, since it uses as much as digits as its factorization.

22821839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 22821839 is about 4777.2208448009. The cubic root of 22821839 is about 283.6504949732.

The spelling of 22821839 in words is "twenty-two million, eight hundred twenty-one thousand, eight hundred thirty-nine".