20321412 has 36 divisors (see below), whose sum is σ = 50054256. Its totient is φ = 6415920.

The previous prime is 20321401. The next prime is 20321417. The reversal of 20321412 is 21412302.

It is a junction number, because it is equal to n+sod(n) for n = 20321391 and 20321400.

It is not an unprimeable number, because it can be changed into a prime (20321417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1987 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (1390396).

Almost surely, 2^20321412 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 20321412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25027128).

20321412 is an abundant number, since it is smaller than the sum of its proper divisors (29732844).

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

20321412 is a wasteful number, since it uses less digits than its factorization.

20321412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736 (or 4715 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20321412 is about 4507.9276835371. The cubic root of 20321412 is about 272.8881184934. Note that the first 3 decimals are identical.

Adding to 20321412 its reverse (21412302), we get a palindrome (41733714).

The spelling of 20321412 in words is "twenty million, three hundred twenty-one thousand, four hundred twelve".