22681978 has 16 divisors (see below), whose sum is σ = 39299904. Its totient is φ = 9703360.

The previous prime is 22681969. The next prime is 22682003. The reversal of 22681978 is 87918622.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29950 + ... + 30697.

It is an arithmetic number, because the mean of its divisors is an integer number (2456244).

Almost surely, 2^22681978 is an apocalyptic number.

22681978 is a deficient number, since it is larger than the sum of its proper divisors (16617926).

22681978 is a wasteful number, since it uses less digits than its factorization.

22681978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60677.

The product of its digits is 96768, while the sum is 43.

The square root of 22681978 is about 4762.5600258684. The cubic root of 22681978 is about 283.0698675028.

The spelling of 22681978 in words is "twenty-two million, six hundred eighty-one thousand, nine hundred seventy-eight".