22038284021 has 4 divisors (see below), whose sum is σ = 23733536652. Its totient is φ = 20343031392.

The previous prime is 22038284011. The next prime is 22038284077. The reversal of 22038284021 is 12048283022.

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 10177984996 + 11860299025 = 100886^2 + 108905^2 .

It is a cyclic number.

It is not a de Polignac number, because 22038284021 - 2²⁶ = 21971175157 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 (22038284011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847626296 + ... + 847626321.

It is an arithmetic number, because the mean of its divisors is an integer number (5933384163).

Almost surely, 2^22038284021 is an apocalyptic number.

It is an amenable number.

22038284021 is a deficient number, since it is larger than the sum of its proper divisors (1695252631).

22038284021 is a wasteful number, since it uses less digits than its factorization.

22038284021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695252630.

The product of its (nonzero) digits is 12288, while the sum is 32.

Subtracting from 22038284021 its reverse (12048283022), we obtain a palindrome (9990000999).

It can be divided in two parts, 220382 and 84021, that added together give a palindrome (304403).

The spelling of 22038284021 in words is "twenty-two billion, thirty-eight million, two hundred eighty-four thousand, twenty-one".