21632326 has 8 divisors (see below), whose sum is σ = 32512104. Its totient is φ = 10794960.

The previous prime is 21632323. The next prime is 21632339. The reversal of 21632326 is 62323612.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21632326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632323) 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, 9295 + ... + 11386.

It is an arithmetic number, because the mean of its divisors is an integer number (4064013).

Almost surely, 2^21632326 is an apocalyptic number.

21632326 is a deficient number, since it is larger than the sum of its proper divisors (10879778).

21632326 is a wasteful number, since it uses less digits than its factorization.

21632326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21206.

The product of its digits is 2592, while the sum is 25.

The square root of 21632326 is about 4651.0564391329. The cubic root of 21632326 is about 278.6341903984.

Adding to 21632326 its reverse (62323612), we get a palindrome (83955938).

It can be divided in two parts, 2163 and 2326, that added together give a square (4489 = 67²).

The spelling of 21632326 in words is "twenty-one million, six hundred thirty-two thousand, three hundred twenty-six".