22040723 has 4 divisors (see below), whose sum is σ = 22214400. Its totient is φ = 21867048.

The previous prime is 22040713. The next prime is 22040731. The reversal of 22040723 is 32704022.

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 22040723 - 2¹² = 22036627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22040695 and 22040704.

It is not an unprimeable number, because it can be changed into a prime (22040713) 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, 86648 + ... + 86901.

It is an arithmetic number, because the mean of its divisors is an integer number (5553600).

Almost surely, 2^22040723 is an apocalyptic number.

22040723 is a deficient number, since it is larger than the sum of its proper divisors (173677).

22040723 is a wasteful number, since it uses less digits than its factorization.

22040723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173676.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 22040723 is about 4694.7548391796. The cubic root of 22040723 is about 280.3767165715.

Adding to 22040723 its reverse (32704022), we get a palindrome (54744745).

The spelling of 22040723 in words is "twenty-two million, forty thousand, seven hundred twenty-three".