20442422213 has 4 divisors (see below), whose sum is σ = 20722455468. Its totient is φ = 20162388960.

The previous prime is 20442422207. The next prime is 20442422233. The reversal of 20442422213 is 31222424402.

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 9216384004 + 11226038209 = 96002^2 + 105953^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442422213 - 2⁴ = 20442422197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442422233) 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, 140016518 + ... + 140016663.

It is an arithmetic number, because the mean of its divisors is an integer number (5180613867).

Almost surely, 2^20442422213 is an apocalyptic number.

It is an amenable number.

20442422213 is a deficient number, since it is larger than the sum of its proper divisors (280033255).

20442422213 is an equidigital number, since it uses as much as digits as its factorization.

20442422213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280033254.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20442422213 its reverse (31222424402), we get a palindrome (51664846615).

The spelling of 20442422213 in words is "twenty billion, four hundred forty-two million, four hundred twenty-two thousand, two hundred thirteen".