21033882 has 24 divisors (see below), whose sum is σ = 45690996. Its totient is φ = 6993216.

The previous prime is 21033877. The next prime is 21033907. The reversal of 21033882 is 28833012.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 594441 = 4521^2 + 771^2 .

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, 6948 + ... + 9504.

Almost surely, 2^21033882 is an apocalyptic number.

21033882 is an abundant number, since it is smaller than the sum of its proper divisors (24657114).

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

21033882 is a wasteful number, since it uses less digits than its factorization.

21033882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 21033882 is about 4586.2710342935. The cubic root of 21033882 is about 276.0407154804.

Adding to 21033882 its reverse (28833012), we get a palindrome (49866894).

The spelling of 21033882 in words is "twenty-one million, thirty-three thousand, eight hundred eighty-two".