22494481 has 2 divisors, whose sum is σ = 22494482. Its totient is φ = 22494480.

The previous prime is 22494473. The next prime is 22494487. The reversal of 22494481 is 18449422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 5022081 = 4180^2 + 2241^2 .

It is a cyclic number.

It is not a de Polignac number, because 22494481 - 2³ = 22494473 is a prime.

It is a super-2 number, since 2×22494481² = 1012003350918722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22494487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11247240 + 11247241.

It is an arithmetic number, because the mean of its divisors is an integer number (11247241).

Almost surely, 2^22494481 is an apocalyptic number.

It is an amenable number.

22494481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22494481 is an equidigital number, since it uses as much as digits as its factorization.

22494481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 22494481 is about 4742.8347008935. The cubic root of 22494481 is about 282.2877242086.

The spelling of 22494481 in words is "twenty-two million, four hundred ninety-four thousand, four hundred eighty-one".