20224481 has 2 divisors, whose sum is σ = 20224482. Its totient is φ = 20224480.

The previous prime is 20224469. The next prime is 20224483. The reversal of 20224481 is 18442202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13249600 + 6974881 = 3640^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 20224481 - 2¹⁰ = 20223457 is a prime.

It is a super-2 number, since 2×20224481² = 818059263438722, which contains 22 as substring.

Together with 20224483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20224483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112240 + 10112241.

It is an arithmetic number, because the mean of its divisors is an integer number (10112241).

Almost surely, 2^20224481 is an apocalyptic number.

It is an amenable number.

20224481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224481 is an equidigital number, since it uses as much as digits as its factorization.

20224481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20224481 is about 4497.1636616872. The cubic root of 20224481 is about 272.4535442508.

Adding to 20224481 its reverse (18442202), we get a palindrome (38666683).

The spelling of 20224481 in words is "twenty million, two hundred twenty-four thousand, four hundred eighty-one".