22668381 has 12 divisors (see below), whose sum is σ = 32928480. Its totient is φ = 15026760.

The previous prime is 22668377. The next prime is 22668397. The reversal of 22668381 is 18386622.

It is not a de Polignac number, because 22668381 - 2² = 22668377 is a prime.

It is a super-2 number, since 2×22668381² = 1027710994322322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22668341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5425 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (2744040).

Almost surely, 2^22668381 is an apocalyptic number.

It is an amenable number.

22668381 is a deficient number, since it is larger than the sum of its proper divisors (10260099).

22668381 is a wasteful number, since it uses less digits than its factorization.

22668381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14256 (or 14253 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 22668381 is about 4761.1323233029. The cubic root of 22668381 is about 283.0132929199.

The spelling of 22668381 in words is "twenty-two million, six hundred sixty-eight thousand, three hundred eighty-one".