21412352 has 40 divisors (see below), whose sum is σ = 46088196. Its totient is φ = 9879552.

The previous prime is 21412337. The next prime is 21412357. The reversal of 21412352 is 25321412.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 30976 = 4624^2 + 176^2 .

It is not an unprimeable number, because it can be changed into a prime (21412357) 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, 5048 + ... + 8264.

Almost surely, 2^21412352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21412352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23044098).

21412352 is an abundant number, since it is smaller than the sum of its proper divisors (24675844).

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

21412352 is an equidigital number, since it uses as much as digits as its factorization.

21412352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 3232 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 21412352 is about 4627.3482687172. The cubic root of 21412352 is about 277.6865158450.

Adding to 21412352 its reverse (25321412), we get a palindrome (46733764).

The spelling of 21412352 in words is "twenty-one million, four hundred twelve thousand, three hundred fifty-two".