21233082 has 32 divisors (see below), whose sum is σ = 46089792. Its totient is φ = 6482304.

The previous prime is 21233081. The next prime is 21233087. The reversal of 21233082 is 28033212.

It is not an unprimeable number, because it can be changed into a prime (21233081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9693 + ... + 11679.

It is an arithmetic number, because the mean of its divisors is an integer number (1440306).

Almost surely, 2^21233082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23044896).

21233082 is an abundant number, since it is smaller than the sum of its proper divisors (24856710).

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

21233082 is a wasteful number, since it uses less digits than its factorization.

21233082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21233082 is about 4607.9368485256. The cubic root of 21233082 is about 276.9093874881.

Adding to 21233082 its reverse (28033212), we get a palindrome (49266294).

The spelling of 21233082 in words is "twenty-one million, two hundred thirty-three thousand, eighty-two".