20311131120 has 120 divisors (see below), whose sum is σ = 73244468304. Its totient is φ = 4642541568.

The previous prime is 20311131083. The next prime is 20311131131. The reversal of 20311131120 is 2113111302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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 20311131120.

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 23 ways as a sum of consecutive naturals, for example, 851809 + ... + 875328.

Almost surely, 2^20311131120 is an apocalyptic number.

20311131120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311131120 is an abundant number, since it is smaller than the sum of its proper divisors (52933337184).

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

20311131120 is a wasteful number, since it uses less digits than its factorization.

20311131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727167 (or 1727154 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20311131120 its reverse (2113111302), we get a palindrome (22424242422).

The spelling of 20311131120 in words is "twenty billion, three hundred eleven million, one hundred thirty-one thousand, one hundred twenty".