21232336 has 20 divisors (see below), whose sum is σ = 41215492. Its totient is φ = 10596096.

The previous prime is 21232307. The next prime is 21232363. The reversal of 21232336 is 63323212.

It can be written as a sum of positive squares in 2 ways, for example, as 5550736 + 15681600 = 2356^2 + 3960^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11236 + ... + 12988.

Almost surely, 2^21232336 is an apocalyptic number.

It is an amenable number.

21232336 is a deficient number, since it is larger than the sum of its proper divisors (19983156).

21232336 is a wasteful number, since it uses less digits than its factorization.

21232336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518 (or 2512 counting only the distinct ones).

The product of its digits is 1296, while the sum is 22.

The square root of 21232336 is about 4607.8559005247. The cubic root of 21232336 is about 276.9061444854.

Adding to 21232336 its reverse (63323212), we get a palindrome (84555548).

The spelling of 21232336 in words is "twenty-one million, two hundred thirty-two thousand, three hundred thirty-six".