21826122 has 16 divisors (see below), whose sum is σ = 43817760. Its totient is φ = 7247792.

The previous prime is 21826109. The next prime is 21826127. The reversal of 21826122 is 22162812.

It is a junction number, because it is equal to n+sod(n) for n = 21826092 and 21826101.

It is not an unprimeable number, because it can be changed into a prime (21826127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5148 + ... + 8375.

It is an arithmetic number, because the mean of its divisors is an integer number (2738610).

Almost surely, 2^21826122 is an apocalyptic number.

21826122 is an abundant number, since it is smaller than the sum of its proper divisors (21991638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21826122 is a wasteful number, since it uses less digits than its factorization.

21826122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13797.

The product of its digits is 768, while the sum is 24.

The square root of 21826122 is about 4671.8435333388. The cubic root of 21826122 is about 279.4637781707.

Adding to 21826122 its reverse (22162812), we get a palindrome (43988934).

The spelling of 21826122 in words is "twenty-one million, eight hundred twenty-six thousand, one hundred twenty-two".