21461326 has 8 divisors (see below), whose sum is σ = 32315184. Its totient is φ = 10689600.

The previous prime is 21461287. The next prime is 21461329. The reversal of 21461326 is 62316412.

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 21461326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461329) 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, 19875 + ... + 20926.

It is an arithmetic number, because the mean of its divisors is an integer number (4039398).

Almost surely, 2^21461326 is an apocalyptic number.

21461326 is a deficient number, since it is larger than the sum of its proper divisors (10853858).

21461326 is a wasteful number, since it uses less digits than its factorization.

21461326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41066.

The product of its digits is 1728, while the sum is 25.

The square root of 21461326 is about 4632.6370460031. The cubic root of 21461326 is about 277.8980614123.

Adding to 21461326 its reverse (62316412), we get a palindrome (83777738).

The spelling of 21461326 in words is "twenty-one million, four hundred sixty-one thousand, three hundred twenty-six".