20031312120 has 64 divisors (see below), whose sum is σ = 60142500000. Its totient is φ = 5337366528.

The previous prime is 20031312107. The next prime is 20031312121. The reversal of 20031312120 is 2121313002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20031312120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031312121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83056 + ... + 216704.

Almost surely, 2^20031312120 is an apocalyptic number.

20031312120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031312120 is an abundant number, since it is smaller than the sum of its proper divisors (40111187880).

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

20031312120 is a wasteful number, since it uses less digits than its factorization.

20031312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134912 (or 134908 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20031312120 its reverse (2121313002), we get a palindrome (22152625122).

The spelling of 20031312120 in words is "twenty billion, thirty-one million, three hundred twelve thousand, one hundred twenty".