20224447 has 2 divisors, whose sum is σ = 20224448. Its totient is φ = 20224446.

The previous prime is 20224423. The next prime is 20224453. The reversal of 20224447 is 74442202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20224447 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20224247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112223 + 10112224.

It is an arithmetic number, because the mean of its divisors is an integer number (10112224).

Almost surely, 2^20224447 is an apocalyptic number.

20224447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224447 is an equidigital number, since it uses as much as digits as its factorization.

20224447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 20224447 is about 4497.1598815252. The cubic root of 20224447 is about 272.4533915740.

Adding to 20224447 its reverse (74442202), we get a palindrome (94666649).

It can be divided in two parts, 202 and 24447, that added together give a square (24649 = 157²).

The spelling of 20224447 in words is "twenty million, two hundred twenty-four thousand, four hundred forty-seven".