20943312 has 40 divisors (see below), whose sum is σ = 58267104. Its totient is φ = 6443904.

The previous prime is 20943287. The next prime is 20943319. The reversal of 20943312 is 21334902.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20943319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16158 + ... + 17405.

Almost surely, 2^20943312 is an apocalyptic number.

It is an amenable number.

20943312 is an abundant number, since it is smaller than the sum of its proper divisors (37323792).

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

20943312 is a wasteful number, since it uses less digits than its factorization.

20943312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33587 (or 33581 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20943312 is about 4576.3863473269. The cubic root of 20943312 is about 275.6439432993.

The spelling of 20943312 in words is "twenty million, nine hundred forty-three thousand, three hundred twelve".