22146808949 has 2 divisors, whose sum is σ = 22146808950. Its totient is φ = 22146808948.

The previous prime is 22146808933. The next prime is 22146808963. The reversal of 22146808949 is 94980864122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16534102225 + 5612706724 = 128585^2 + 74918^2 .

It is a cyclic number.

It is not a de Polignac number, because 22146808949 - 2⁴ = 22146808933 is a prime.

It is a super-2 number, since 2×22146808949² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22146808949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22146808919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073404474 + 11073404475.

It is an arithmetic number, because the mean of its divisors is an integer number (11073404475).

Almost surely, 2^22146808949 is an apocalyptic number.

It is an amenable number.

22146808949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22146808949 is an equidigital number, since it uses as much as digits as its factorization.

22146808949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 22146808949 in words is "twenty-two billion, one hundred forty-six million, eight hundred eight thousand, nine hundred forty-nine".