22190723 has 4 divisors (see below), whose sum is σ = 22228248. Its totient is φ = 22153200.

The previous prime is 22190683. The next prime is 22190737. The reversal of 22190723 is 32709122.

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 22190723 - 2¹⁸ = 21928579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22190692 and 22190701.

It is not an unprimeable number, because it can be changed into a prime (22190743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17861 + ... + 19062.

It is an arithmetic number, because the mean of its divisors is an integer number (5557062).

Almost surely, 2^22190723 is an apocalyptic number.

22190723 is a deficient number, since it is larger than the sum of its proper divisors (37525).

22190723 is an equidigital number, since it uses as much as digits as its factorization.

22190723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22190723 is about 4710.7030260886. The cubic root of 22190723 is about 281.0113215889.

Adding to 22190723 its reverse (32709122), we get a palindrome (54899845).

The spelling of 22190723 in words is "twenty-two million, one hundred ninety thousand, seven hundred twenty-three".