20222449 has 4 divisors (see below), whose sum is σ = 21778036. Its totient is φ = 18666864.

The previous prime is 20222437. The next prime is 20222459. The reversal of 20222449 is 94422202.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2582449 + 17640000 = 1607^2 + 4200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222449 - 2⁹ = 20221937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777774 + ... + 777799.

It is an arithmetic number, because the mean of its divisors is an integer number (5444509).

Almost surely, 2^20222449 is an apocalyptic number.

It is an amenable number.

20222449 is a deficient number, since it is larger than the sum of its proper divisors (1555587).

20222449 is a wasteful number, since it uses less digits than its factorization.

20222449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555586.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20222449 is about 4496.9377358376. The cubic root of 20222449 is about 272.4444192677. Note that the first 4 decimals are identical.

The spelling of 20222449 in words is "twenty million, two hundred twenty-two thousand, four hundred forty-nine".