20227797 has 12 divisors (see below), whose sum is σ = 29266380. Its totient is φ = 13462848.

The previous prime is 20227747. The next prime is 20227817. The reversal of 20227797 is 79772202.

It can be written as a sum of positive squares in 2 ways, for example, as 4498641 + 15729156 = 2121^2 + 3966^2 .

It is not a de Polignac number, because 20227797 - 2¹¹ = 20225749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20227747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5329 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (2438865).

Almost surely, 2^20227797 is an apocalyptic number.

It is an amenable number.

20227797 is a deficient number, since it is larger than the sum of its proper divisors (9038583).

20227797 is a wasteful number, since it uses less digits than its factorization.

20227797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 20227797 is about 4497.5323233969. The cubic root of 20227797 is about 272.4684339049.

Adding to 20227797 its reverse (79772202), we get a palindrome (99999999).

The spelling of 20227797 in words is "twenty million, two hundred twenty-seven thousand, seven hundred ninety-seven".