21822892 has 48 divisors (see below), whose sum is σ = 47416320. Its totient is φ = 8557632.

The previous prime is 21822869. The next prime is 21822901. The reversal of 21822892 is 29822812.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60609 + ... + 60967.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^21822892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21822892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23708160).

21822892 is an abundant number, since it is smaller than the sum of its proper divisors (25593428).

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

21822892 is a wasteful number, since it uses less digits than its factorization.

21822892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 21822892 is about 4671.4978326014. The cubic root of 21822892 is about 279.4499917464.

The spelling of 21822892 in words is "twenty-one million, eight hundred twenty-two thousand, eight hundred ninety-two".