20120203312 has 30 divisors (see below), whose sum is σ = 42848970164. Its totient is φ = 9145546080.

The previous prime is 20120203291. The next prime is 20120203319. The reversal of 20120203312 is 21330202102.

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

It is not an unprimeable number, because it can be changed into a prime (20120203319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5194398 + ... + 5198269.

Almost surely, 2^20120203312 is an apocalyptic number.

20120203312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20120203312 is an abundant number, since it is smaller than the sum of its proper divisors (22728766852).

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

20120203312 is a wasteful number, since it uses less digits than its factorization.

20120203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392697 (or 10392680 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20120203312 its reverse (21330202102), we get a palindrome (41450405414).

The spelling of 20120203312 in words is "twenty billion, one hundred twenty million, two hundred three thousand, three hundred twelve".