22065945 has 16 divisors (see below), whose sum is σ = 38515392. Its totient is φ = 10698560.

The previous prime is 22065943. The next prime is 22065961. The reversal of 22065945 is 54956022.

It is not a de Polignac number, because 22065945 - 2¹ = 22065943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (22065943) 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 15 ways as a sum of consecutive naturals, for example, 66702 + ... + 67031.

It is an arithmetic number, because the mean of its divisors is an integer number (2407212).

Almost surely, 2^22065945 is an apocalyptic number.

It is an amenable number.

22065945 is a deficient number, since it is larger than the sum of its proper divisors (16449447).

22065945 is a wasteful number, since it uses less digits than its factorization.

22065945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133752.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 22065945 is about 4697.4402603971. The cubic root of 22065945 is about 280.4836242231.

The spelling of 22065945 in words is "twenty-two million, sixty-five thousand, nine hundred forty-five".