22818949 has 2 divisors, whose sum is σ = 22818950. Its totient is φ = 22818948.

The previous prime is 22818931. The next prime is 22818989. The reversal of 22818949 is 94981822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 66049 = 4770^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 22818949 - 2¹⁹ = 22294661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22818989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11409474 + 11409475.

It is an arithmetic number, because the mean of its divisors is an integer number (11409475).

Almost surely, 2^22818949 is an apocalyptic number.

It is an amenable number.

22818949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22818949 is an equidigital number, since it uses as much as digits as its factorization.

22818949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 22818949 is about 4776.9183581049. The cubic root of 22818949 is about 283.6385212882.

The spelling of 22818949 in words is "twenty-two million, eight hundred eighteen thousand, nine hundred forty-nine".