20205312 has 36 divisors (see below), whose sum is σ = 53777640. Its totient is φ = 6734848.

The previous prime is 20205307. The next prime is 20205329. The reversal of 20205312 is 21350202.

It is a junction number, because it is equal to n+sod(n) for n = 20205291 and 20205300.

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, 12387 + ... + 13922.

Almost surely, 2^20205312 is an apocalyptic number.

It is an amenable number.

20205312 is an abundant number, since it is smaller than the sum of its proper divisors (33572328).

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

20205312 is an equidigital number, since it uses as much as digits as its factorization.

20205312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26328 (or 26314 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20205312 is about 4495.0319242470. The cubic root of 20205312 is about 272.3674388209.

Adding to 20205312 its reverse (21350202), we get a palindrome (41555514).

The spelling of 20205312 in words is "twenty million, two hundred five thousand, three hundred twelve".