20003312 has 20 divisors (see below), whose sum is σ = 44293296. Its totient is φ = 8572800.

The previous prime is 20003297. The next prime is 20003317. The reversal of 20003312 is 21330002.

It is a junction number, because it is equal to n+sod(n) for n = 20003293 and 20003302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89189 + ... + 89412.

Almost surely, 2^20003312 is an apocalyptic number.

It is an amenable number.

20003312 is an abundant number, since it is smaller than the sum of its proper divisors (24289984).

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

20003312 is a wasteful number, since it uses less digits than its factorization.

20003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178616 (or 178610 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20003312 is about 4472.5062325278. The cubic root of 20003312 is about 271.4567444177.

Adding to 20003312 its reverse (21330002), we get a palindrome (41333314).

The spelling of 20003312 in words is "twenty million, three thousand, three hundred twelve".