22668493 has 4 divisors (see below), whose sum is σ = 22679388. Its totient is φ = 22657600.

The previous prime is 22668491. The next prime is 22668511. The reversal of 22668493 is 39486622.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10745284 + 11923209 = 3278^2 + 3453^2 .

It is a cyclic number.

It is not a de Polignac number, because 22668493 - 2¹ = 22668491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22668491) 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, 1246 + ... + 6847.

It is an arithmetic number, because the mean of its divisors is an integer number (5669847).

Almost surely, 2^22668493 is an apocalyptic number.

It is an amenable number.

22668493 is a deficient number, since it is larger than the sum of its proper divisors (10895).

22668493 is an equidigital number, since it uses as much as digits as its factorization.

22668493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10894.

The product of its digits is 124416, while the sum is 40.

The square root of 22668493 is about 4761.1440851963. The cubic root of 22668493 is about 283.0137590234.

The spelling of 22668493 in words is "twenty-two million, six hundred sixty-eight thousand, four hundred ninety-three".