22164747 has 16 divisors (see below), whose sum is σ = 32323968. Its totient is φ = 13398080.

The previous prime is 22164743. The next prime is 22164749. The reversal of 22164747 is 74746122.

It is a cyclic number.

It is not a de Polignac number, because 22164747 - 2² = 22164743 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 (22164743) 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, 17983 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (2020248).

Almost surely, 2^22164747 is an apocalyptic number.

22164747 is a deficient number, since it is larger than the sum of its proper divisors (10159221).

22164747 is a wasteful number, since it uses less digits than its factorization.

22164747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its digits is 18816, while the sum is 33.

The square root of 22164747 is about 4707.9450931378. The cubic root of 22164747 is about 280.9016301024.

The spelling of 22164747 in words is "twenty-two million, one hundred sixty-four thousand, seven hundred forty-seven".