20222247 has 8 divisors (see below), whose sum is σ = 27100656. Its totient is φ = 13412672.

The previous prime is 20222243. The next prime is 20222249. The reversal of 20222247 is 74222202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20222247 - 2² = 20222243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222243) 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 7 ways as a sum of consecutive naturals, for example, 16518 + ... + 17699.

It is an arithmetic number, because the mean of its divisors is an integer number (3387582).

Almost surely, 2^20222247 is an apocalyptic number.

20222247 is a deficient number, since it is larger than the sum of its proper divisors (6878409).

20222247 is a wasteful number, since it uses less digits than its factorization.

20222247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34417.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20222247 is about 4496.9152760531. The cubic root of 20222247 is about 272.4435121247.

Adding to 20222247 its reverse (74222202), we get a palindrome (94444449).

The spelling of 20222247 in words is "twenty million, two hundred twenty-two thousand, two hundred forty-seven".