22064647 has 4 divisors (see below), whose sum is σ = 24070536. Its totient is φ = 20058760.

The previous prime is 22064639. The next prime is 22064671. The reversal of 22064647 is 74646022.

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 22064647 - 2³ = 22064639 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22064677) 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, 1002928 + ... + 1002949.

It is an arithmetic number, because the mean of its divisors is an integer number (6017634).

Almost surely, 2^22064647 is an apocalyptic number.

22064647 is a deficient number, since it is larger than the sum of its proper divisors (2005889).

22064647 is a wasteful number, since it uses less digits than its factorization.

22064647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005888.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 22064647 is about 4697.3020980133. The cubic root of 22064647 is about 280.4781244227.

The spelling of 22064647 in words is "twenty-two million, sixty-four thousand, six hundred forty-seven".