20442213 has 20 divisors (see below), whose sum is σ = 33314688. Its totient is φ = 12388680.

The previous prime is 20442203. The next prime is 20442269. The reversal of 20442213 is 31224402.

It is not a de Polignac number, because 20442213 - 2²² = 16247909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442203) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10581 + ... + 12362.

Almost surely, 2^20442213 is an apocalyptic number.

It is an amenable number.

20442213 is a deficient number, since it is larger than the sum of its proper divisors (12872475).

20442213 is a wasteful number, since it uses less digits than its factorization.

20442213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22966 (or 22957 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20442213 is about 4521.3065589495. The cubic root of 20442213 is about 273.4277800060.

Adding to 20442213 its reverse (31224402), we get a palindrome (51666615).

The spelling of 20442213 in words is "twenty million, four hundred forty-two thousand, two hundred thirteen".