22681936 has 20 divisors (see below), whose sum is σ = 44020372. Its totient is φ = 11321856.

The previous prime is 22681931. The next prime is 22681943. The reversal of 22681936 is 63918622.

It can be written as a sum of positive squares in 2 ways, for example, as 22505536 + 176400 = 4744^2 + 420^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22681895 and 22681904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22681931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16840 + ... + 18136.

Almost surely, 2^22681936 is an apocalyptic number.

It is an amenable number.

22681936 is a deficient number, since it is larger than the sum of its proper divisors (21338436).

22681936 is a wasteful number, since it uses less digits than its factorization.

22681936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2392 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 22681936 is about 4762.5556164732. Note that the first 3 decimals coincide. The cubic root of 22681936 is about 283.0696927834.

The spelling of 22681936 in words is "twenty-two million, six hundred eighty-one thousand, nine hundred thirty-six".