21882330 has 24 divisors (see below), whose sum is σ = 56894292. Its totient is φ = 5835264.

The previous prime is 21882299. The next prime is 21882331. The reversal of 21882330 is 3328812.

21882330 = 2090² + 2091² + ... + 2094².

It can be written as a sum of positive squares in 2 ways, for example, as 18844281 + 3038049 = 4341^2 + 1743^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21882294 and 21882303.

It is not an unprimeable number, because it can be changed into a prime (21882331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121479 + ... + 121658.

Almost surely, 2^21882330 is an apocalyptic number.

21882330 is an abundant number, since it is smaller than the sum of its proper divisors (35011962).

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

21882330 is a wasteful number, since it uses less digits than its factorization.

21882330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243150 (or 243147 counting only the distinct ones).

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

The square root of 21882330 is about 4677.8552777956. The cubic root of 21882330 is about 279.7034700888.

The spelling of 21882330 in words is "twenty-one million, eight hundred eighty-two thousand, three hundred thirty".