21412326 has 16 divisors (see below), whose sum is σ = 46119024. Its totient is φ = 6588384.

The previous prime is 21412319. The next prime is 21412337. The reversal of 21412326 is 62321412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137181 + ... + 137336.

It is an arithmetic number, because the mean of its divisors is an integer number (2882439).

Almost surely, 2^21412326 is an apocalyptic number.

21412326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21412326 is an abundant number, since it is smaller than the sum of its proper divisors (24706698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21412326 is a wasteful number, since it uses less digits than its factorization.

21412326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274535.

The product of its digits is 576, while the sum is 21.

The square root of 21412326 is about 4627.3454593319. The cubic root of 21412326 is about 277.6864034511.

Adding to 21412326 its reverse (62321412), we get a palindrome (83733738).

The spelling of 21412326 in words is "twenty-one million, four hundred twelve thousand, three hundred twenty-six".