22549947 has 24 divisors (see below), whose sum is σ = 35272512. Its totient is φ = 12776400.

The previous prime is 22549921. The next prime is 22549957. The reversal of 22549947 is 74994522.

It is not a de Polignac number, because 22549947 - 2⁷ = 22549819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22549899 and 22549908.

It is not an unprimeable number, because it can be changed into a prime (22549957) 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 in 23 ways as a sum of consecutive naturals, for example, 18672 + ... + 19842.

It is an arithmetic number, because the mean of its divisors is an integer number (1469688).

Almost surely, 2^22549947 is an apocalyptic number.

22549947 is a deficient number, since it is larger than the sum of its proper divisors (12722565).

22549947 is a wasteful number, since it uses less digits than its factorization.

22549947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1312 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 22549947 is about 4748.6784477368. The cubic root of 22549947 is about 282.5195517311.

The spelling of 22549947 in words is "twenty-two million, five hundred forty-nine thousand, nine hundred forty-seven".