21162832 has 20 divisors (see below), whose sum is σ = 42326656. Its totient is φ = 10239840.

The previous prime is 21162811. The next prime is 21162839. The reversal of 21162832 is 23826112.

21162832 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21162797 and 21162806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20838 + ... + 21829.

Almost surely, 2^21162832 is an apocalyptic number.

It is an amenable number.

21162832 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21162832 is a wasteful number, since it uses less digits than its factorization.

21162832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42706 (or 42700 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 21162832 is about 4600.3078157880. The cubic root of 21162832 is about 276.6036636591.

Adding to 21162832 its reverse (23826112), we get a palindrome (44988944).

The spelling of 21162832 in words is "twenty-one million, one hundred sixty-two thousand, eight hundred thirty-two".