21832011 has 20 divisors (see below), whose sum is σ = 32742600. Its totient is φ = 14497056.

The previous prime is 21832009. The next prime is 21832051. The reversal of 21832011 is 11023812.

It is not a de Polignac number, because 21832011 - 2¹ = 21832009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21832051) 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 19 ways as a sum of consecutive naturals, for example, 32800 + ... + 33458.

It is an arithmetic number, because the mean of its divisors is an integer number (1637130).

Almost surely, 2^21832011 is an apocalyptic number.

21832011 is a deficient number, since it is larger than the sum of its proper divisors (10910589).

21832011 is an equidigital number, since it uses as much as digits as its factorization.

21832011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 21832011 is about 4672.4737559456. The cubic root of 21832011 is about 279.4889103524.

Adding to 21832011 its reverse (11023812), we get a palindrome (32855823).

The spelling of 21832011 in words is "twenty-one million, eight hundred thirty-two thousand, eleven".