2131506306020 has 96 divisors (see below), whose sum is σ = 5512555507200. Its totient is φ = 674166426624.

The previous prime is 2131506306019. The next prime is 2131506306029. The reversal of 2131506306020 is 206036051312.

It is not an unprimeable number, because it can be changed into a prime (2131506306029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2564441 + ... + 3292319.

It is an arithmetic number, because the mean of its divisors is an integer number (57422453200).

Almost surely, 2^{2131506306020} is an apocalyptic number.

2131506306020 is a gapful number since it is divisible by the number (20) 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 2131506306020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2756277753600).

2131506306020 is an abundant number, since it is smaller than the sum of its proper divisors (3381049201180).

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

2131506306020 is a wasteful number, since it uses less digits than its factorization.

2131506306020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729517 (or 729515 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 2131506306020 in words is "two trillion, one hundred thirty-one billion, five hundred six million, three hundred six thousand, twenty".