22168493 has 4 divisors (see below), whose sum is σ = 23472540. Its totient is φ = 20864448.

The previous prime is 22168457. The next prime is 22168507. The reversal of 22168493 is 39486122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 10355524 = 3437^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 22168493 - 2⁶ = 22168429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22198493) 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, 651998 + ... + 652031.

It is an arithmetic number, because the mean of its divisors is an integer number (5868135).

Almost surely, 2^22168493 is an apocalyptic number.

It is an amenable number.

22168493 is a deficient number, since it is larger than the sum of its proper divisors (1304047).

22168493 is a wasteful number, since it uses less digits than its factorization.

22168493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304046.

The product of its digits is 20736, while the sum is 35.

The square root of 22168493 is about 4708.3429144445. The cubic root of 22168493 is about 280.9174540026.

The spelling of 22168493 in words is "twenty-two million, one hundred sixty-eight thousand, four hundred ninety-three".