131320020 has 96 divisors (see below), whose sum is σ = 416868480. Its totient is φ = 30620160.

The previous prime is 131320009. The next prime is 131320031. The reversal of 131320020 is 20023131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131320009) and next prime (131320031).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 131319978 and 131320005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10390 + ... + 19250.

It is an arithmetic number, because the mean of its divisors is an integer number (4342380).

Almost surely, 2^131320020 is an apocalyptic number.

131320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208434240).

131320020 is an abundant number, since it is smaller than the sum of its proper divisors (285548460).

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

131320020 is a wasteful number, since it uses less digits than its factorization.

131320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8905 (or 8903 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 131320020 is about 11459.4947532603. The cubic root of 131320020 is about 508.2885344975.

Adding to 131320020 its reverse (20023131), we get a palindrome (151343151).

The spelling of 131320020 in words is "one hundred thirty-one million, three hundred twenty thousand, twenty".