21063822 has 24 divisors (see below), whose sum is σ = 45619704. Its totient is φ = 6480864.

The previous prime is 21063817. The next prime is 21063857. The reversal of 21063822 is 22836012.

It is a junction number, because it is equal to n+sod(n) for n = 21063792 and 21063801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9373 + ... + 11400.

It is an arithmetic number, because the mean of its divisors is an integer number (1900821).

Almost surely, 2^21063822 is an apocalyptic number.

21063822 is an abundant number, since it is smaller than the sum of its proper divisors (24555882).

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

21063822 is a wasteful number, since it uses less digits than its factorization.

21063822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20804 (or 20791 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21063822 is about 4589.5339632690. The cubic root of 21063822 is about 276.1716271331.

Adding to 21063822 its reverse (22836012), we get a palindrome (43899834).

The spelling of 21063822 in words is "twenty-one million, sixty-three thousand, eight hundred twenty-two".