20323312 has 20 divisors (see below), whose sum is σ = 41449480. Its totient is φ = 9626688.

The previous prime is 20323291. The next prime is 20323333. The reversal of 20323312 is 21332302.

It is an interprime number because it is at equal distance from previous prime (20323291) and next prime (20323333).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33123 + ... + 33730.

It is an arithmetic number, because the mean of its divisors is an integer number (2072474).

Almost surely, 2^20323312 is an apocalyptic number.

It is an amenable number.

20323312 is an abundant number, since it is smaller than the sum of its proper divisors (21126168).

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

20323312 is a wasteful number, since it uses less digits than its factorization.

20323312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66880 (or 66874 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20323312 is about 4508.1384184606. The cubic root of 20323312 is about 272.8966230086.

Adding to 20323312 its reverse (21332302), we get a palindrome (41655614).

The spelling of 20323312 in words is "twenty million, three hundred twenty-three thousand, three hundred twelve".