21411232 has 24 divisors (see below), whose sum is σ = 42287616. Its totient is φ = 10671552.

The previous prime is 21411223. The next prime is 21411239. The reversal of 21411232 is 23211412.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (21411239) 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, 11383 + ... + 13129.

It is an arithmetic number, because the mean of its divisors is an integer number (1761984).

Almost surely, 2^21411232 is an apocalyptic number.

It is an amenable number.

21411232 is a deficient number, since it is larger than the sum of its proper divisors (20876384).

21411232 is a wasteful number, since it uses less digits than its factorization.

21411232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 2132 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 21411232 is about 4627.2272474993. The cubic root of 21411232 is about 277.6816741798.

Adding to 21411232 its reverse (23211412), we get a palindrome (44622644).

The spelling of 21411232 in words is "twenty-one million, four hundred eleven thousand, two hundred thirty-two".