20031000120 has 48 divisors (see below), whose sum is σ = 65100751560. Its totient is φ = 5341599936.

The previous prime is 20031000043. The next prime is 20031000131. The reversal of 20031000120 is 2100013002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27820474 + ... + 27821193.

Almost surely, 2^20031000120 is an apocalyptic number.

20031000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031000120 is an abundant number, since it is smaller than the sum of its proper divisors (45069751440).

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

20031000120 is a wasteful number, since it uses less digits than its factorization.

20031000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55641684 (or 55641677 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20031000120 its reverse (2100013002), we get a palindrome (22131013122).

The spelling of 20031000120 in words is "twenty billion, thirty-one million, one hundred twenty", and thus it is an aban number.