22120647 has 4 divisors (see below), whose sum is σ = 29494200. Its totient is φ = 14747096.

The previous prime is 22120643. The next prime is 22120661. The reversal of 22120647 is 74602122.

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 22120647 - 2² = 22120643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120643) 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, 3686772 + ... + 3686777.

It is an arithmetic number, because the mean of its divisors is an integer number (7373550).

Almost surely, 2^22120647 is an apocalyptic number.

22120647 is a deficient number, since it is larger than the sum of its proper divisors (7373553).

22120647 is an equidigital number, since it uses as much as digits as its factorization.

22120647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373552.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 22120647 is about 4703.2591891156. The cubic root of 22120647 is about 280.7152081424.

Adding to 22120647 its reverse (74602122), we get a palindrome (96722769).

The spelling of 22120647 in words is "twenty-two million, one hundred twenty thousand, six hundred forty-seven".