22041981 has 24 divisors (see below), whose sum is σ = 35782656. Its totient is φ = 12972960.

The previous prime is 22041967. The next prime is 22041983. The reversal of 22041981 is 18914022.

It is not a de Polignac number, because 22041981 - 2⁵ = 22041949 is a prime.

It is a super-2 number, since 2×22041981² = 971697852808722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22041983) 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, 1405 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (1490944).

Almost surely, 2^22041981 is an apocalyptic number.

It is an amenable number.

22041981 is a deficient number, since it is larger than the sum of its proper divisors (13740675).

22041981 is a wasteful number, since it uses less digits than its factorization.

22041981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233 (or 8230 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 22041981 is about 4694.8888165749. Note that the first 4 decimals coincide. The cubic root of 22041981 is about 280.3820507462.

The spelling of 22041981 in words is "twenty-two million, forty-one thousand, nine hundred eighty-one".