20422255 has 8 divisors (see below), whose sum is σ = 28007712. Its totient is φ = 14003808.

The previous prime is 20422249. The next prime is 20422267. The reversal of 20422255 is 55222402.

It is a happy number.

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

It is not a de Polignac number, because 20422255 - 2³ = 20422247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291712 + ... + 291781.

It is an arithmetic number, because the mean of its divisors is an integer number (3500964).

Almost surely, 2^20422255 is an apocalyptic number.

20422255 is a deficient number, since it is larger than the sum of its proper divisors (7585457).

20422255 is an equidigital number, since it uses as much as digits as its factorization.

20422255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583505.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20422255 is about 4519.0989146068. The cubic root of 20422255 is about 273.3387673254.

Adding to 20422255 its reverse (55222402), we get a palindrome (75644657).

The spelling of 20422255 in words is "twenty million, four hundred twenty-two thousand, two hundred fifty-five".