20243312 has 20 divisors (see below), whose sum is σ = 40927440. Its totient is φ = 9681408.

The previous prime is 20243309. The next prime is 20243339. The reversal of 20243312 is 21334202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27137 + ... + 27872.

It is an arithmetic number, because the mean of its divisors is an integer number (2046372).

Almost surely, 2^20243312 is an apocalyptic number.

It is an amenable number.

20243312 is an abundant number, since it is smaller than the sum of its proper divisors (20684128).

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

20243312 is a wasteful number, since it uses less digits than its factorization.

20243312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55040 (or 55034 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20243312 is about 4499.2568275216. The cubic root of 20243312 is about 272.5380784540.

Adding to 20243312 its reverse (21334202), we get a palindrome (41577514).

The spelling of 20243312 in words is "twenty million, two hundred forty-three thousand, three hundred twelve".