22421979 has 6 divisors (see below), whose sum is σ = 32387316. Its totient is φ = 14947980.

The previous prime is 22421939. The next prime is 22421983. The reversal of 22421979 is 97912422.

It is not a de Polignac number, because 22421979 - 2¹⁷ = 22290907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22421939) 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 5 ways as a sum of consecutive naturals, for example, 1245657 + ... + 1245674.

It is an arithmetic number, because the mean of its divisors is an integer number (5397886).

Almost surely, 2^22421979 is an apocalyptic number.

22421979 is a deficient number, since it is larger than the sum of its proper divisors (9965337).

22421979 is a wasteful number, since it uses less digits than its factorization.

22421979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491337 (or 2491334 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 22421979 is about 4735.1852128507. The cubic root of 22421979 is about 281.9841171076.

The spelling of 22421979 in words is "twenty-two million, four hundred twenty-one thousand, nine hundred seventy-nine".