20226747 has 4 divisors (see below), whose sum is σ = 26969000. Its totient is φ = 13484496.

The previous prime is 20226737. The next prime is 20226749. The reversal of 20226747 is 74762202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20226747 - 2⁸ = 20226491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20226749) 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 3 ways as a sum of consecutive naturals, for example, 3371122 + ... + 3371127.

It is an arithmetic number, because the mean of its divisors is an integer number (6742250).

Almost surely, 2^20226747 is an apocalyptic number.

20226747 is a deficient number, since it is larger than the sum of its proper divisors (6742253).

20226747 is an equidigital number, since it uses as much as digits as its factorization.

20226747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742252.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20226747 is about 4497.4155912035. The cubic root of 20226747 is about 272.4637193232.

Adding to 20226747 its reverse (74762202), we get a palindrome (94988949).

The spelling of 20226747 in words is "twenty million, two hundred twenty-six thousand, seven hundred forty-seven".