22645705 has 4 divisors (see below), whose sum is σ = 27174852. Its totient is φ = 18116560.

The previous prime is 22645687. The next prime is 22645709. The reversal of 22645705 is 50754622.

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 13337104 + 9308601 = 3652^2 + 3051^2 .

It is not a de Polignac number, because 22645705 - 2⁹ = 22645193 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22645709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264566 + ... + 2264575.

It is an arithmetic number, because the mean of its divisors is an integer number (6793713).

Almost surely, 2^22645705 is an apocalyptic number.

It is an amenable number.

22645705 is a deficient number, since it is larger than the sum of its proper divisors (4529147).

22645705 is an equidigital number, since it uses as much as digits as its factorization.

22645705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529146.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 22645705 is about 4758.7503611768. The cubic root of 22645705 is about 282.9188919634.

The spelling of 22645705 in words is "twenty-two million, six hundred forty-five thousand, seven hundred five".