22850021 has 2 divisors, whose sum is σ = 22850022. Its totient is φ = 22850020.

The previous prime is 22850011. The next prime is 22850033. The reversal of 22850021 is 12005822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15484225 + 7365796 = 3935^2 + 2714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22850021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22849975 and 22850002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22850011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11425010 + 11425011.

It is an arithmetic number, because the mean of its divisors is an integer number (11425011).

Almost surely, 2^22850021 is an apocalyptic number.

It is an amenable number.

22850021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22850021 is an equidigital number, since it uses as much as digits as its factorization.

22850021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 22850021 is about 4780.1695576622. The cubic root of 22850021 is about 283.7672040906.

Adding to 22850021 its reverse (12005822), we get a palindrome (34855843).

The spelling of 22850021 in words is "twenty-two million, eight hundred fifty thousand, twenty-one".