21412446 has 16 divisors (see below), whose sum is σ = 46718208. Its totient is φ = 6488600.

The previous prime is 21412441. The next prime is 21412451. The reversal of 21412446 is 64421412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21412441) and next prime (21412451).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162150 + ... + 162281.

It is an arithmetic number, because the mean of its divisors is an integer number (2919888).

Almost surely, 2^21412446 is an apocalyptic number.

21412446 is an abundant number, since it is smaller than the sum of its proper divisors (25305762).

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

21412446 is a wasteful number, since it uses less digits than its factorization.

21412446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324447.

The product of its digits is 1536, while the sum is 24.

The square root of 21412446 is about 4627.3584257112. The cubic root of 21412446 is about 277.6869221914.

Adding to 21412446 its reverse (64421412), we get a palindrome (85833858).

The spelling of 21412446 in words is "twenty-one million, four hundred twelve thousand, four hundred forty-six".