131011342020 has 72 divisors (see below), whose sum is σ = 427970391576. Its totient is φ = 32248945152.

The previous prime is 131011342019. The next prime is 131011342069. The reversal of 131011342020 is 20243110131.

131011342020 is a `hidden beast` number, since 1 + 310 + 11 + 342 + 0 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5197833216 + 125813508804 = 72096^2 + 354702^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131011341984 and 131011342002.

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, 27991537 + ... + 27996216.

Almost surely, 2^131011342020 is an apocalyptic number.

131011342020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131011342020 is an abundant number, since it is smaller than the sum of its proper divisors (296959049556).

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

131011342020 is a wasteful number, since it uses less digits than its factorization.

131011342020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55987781 (or 55987776 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131011342020 its reverse (20243110131), we get a palindrome (151254452151).

The spelling of 131011342020 in words is "one hundred thirty-one billion, eleven million, three hundred forty-two thousand, twenty".