22320623 has 4 divisors (see below), whose sum is σ = 24037608. Its totient is φ = 20603640.

The previous prime is 22320619. The next prime is 22320637. The reversal of 22320623 is 32602322.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22320623 - 2² = 22320619 is a prime.

It is a super-3 number, since 3×22320623³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22320595 and 22320604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22320653) 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, 858473 + ... + 858498.

It is an arithmetic number, because the mean of its divisors is an integer number (6009402).

Almost surely, 2^22320623 is an apocalyptic number.

22320623 is a deficient number, since it is larger than the sum of its proper divisors (1716985).

22320623 is a wasteful number, since it uses less digits than its factorization.

22320623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716984.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 22320623 is about 4724.4706581796. The cubic root of 22320623 is about 281.5585829172.

Adding to 22320623 its reverse (32602322), we get a palindrome (54922945).

The spelling of 22320623 in words is "twenty-two million, three hundred twenty thousand, six hundred twenty-three".