20227789 has 8 divisors (see below), whose sum is σ = 21061880. Its totient is φ = 19408896.

The previous prime is 20227747. The next prime is 20227817. The reversal of 20227789 is 98772202.

It can be written as a sum of positive squares in 4 ways, for example, as 7518564 + 12709225 = 2742^2 + 3565^2 .

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 20227789 - 2¹³ = 20219597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20227709) 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 7 ways as a sum of consecutive naturals, for example, 1044 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (2632735).

Almost surely, 2^20227789 is an apocalyptic number.

It is an amenable number.

20227789 is a deficient number, since it is larger than the sum of its proper divisors (834091).

20227789 is an equidigital number, since it uses as much as digits as its factorization.

20227789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7599.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 20227789 is about 4497.5314340202. The cubic root of 20227789 is about 272.4683979849.

The spelling of 20227789 in words is "twenty million, two hundred twenty-seven thousand, seven hundred eighty-nine".