21132382 has 8 divisors (see below), whose sum is σ = 31876200. Its totient is φ = 10506984.

The previous prime is 21132341. The next prime is 21132383. The reversal of 21132382 is 28323112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29157 + ... + 29872.

It is an arithmetic number, because the mean of its divisors is an integer number (3984525).

Almost surely, 2^21132382 is an apocalyptic number.

21132382 is a deficient number, since it is larger than the sum of its proper divisors (10743818).

21132382 is a wasteful number, since it uses less digits than its factorization.

21132382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59210.

The product of its digits is 576, while the sum is 22.

The square root of 21132382 is about 4596.9970633012. The cubic root of 21132382 is about 276.4709368675.

Adding to 21132382 its reverse (28323112), we get a palindrome (49455494).

The spelling of 21132382 in words is "twenty-one million, one hundred thirty-two thousand, three hundred eighty-two".