20023131120 has 80 divisors (see below), whose sum is σ = 62127526560. Its totient is φ = 5334700032.

The previous prime is 20023131109. The next prime is 20023131127. The reversal of 20023131120 is 2113132002.

It is a tau number, because it is divible by the number of its divisors (80).

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 20023131120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023131127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234012 + ... + 307908.

It is an arithmetic number, because the mean of its divisors is an integer number (776594082).

Almost surely, 2^20023131120 is an apocalyptic number.

20023131120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023131120 is an abundant number, since it is smaller than the sum of its proper divisors (42104395440).

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

20023131120 is a wasteful number, since it uses less digits than its factorization.

20023131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75042 (or 75036 counting only the distinct ones).

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

Adding to 20023131120 its reverse (2113132002), we get a palindrome (22136263122).

The spelling of 20023131120 in words is "twenty billion, twenty-three million, one hundred thirty-one thousand, one hundred twenty".