20004312 has 32 divisors (see below), whose sum is σ = 50338800. Its totient is φ = 6624384.

The previous prime is 20004311. The next prime is 20004323. The reversal of 20004312 is 21340002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004311) 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, 1114 + ... + 6422.

Almost surely, 2^20004312 is an apocalyptic number.

It is an amenable number.

20004312 is an abundant number, since it is smaller than the sum of its proper divisors (30334488).

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

20004312 is a wasteful number, since it uses less digits than its factorization.

20004312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5475 (or 5471 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20004312 is about 4472.6180252733. The cubic root of 20004312 is about 271.4612678723.

Adding to 20004312 its reverse (21340002), we get a palindrome (41344314).

The spelling of 20004312 in words is "twenty million, four thousand, three hundred twelve".