2131230020 has 48 divisors (see below), whose sum is σ = 4593456000. Its totient is φ = 830119680.

The previous prime is 2131229983. The next prime is 2131230089. The reversal of 2131230020 is 200321312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2131229977 and 2131230004.

It is an unprimeable number.

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, 489011 + ... + 493349.

It is an arithmetic number, because the mean of its divisors is an integer number (95697000).

Almost surely, 2^2131230020 is an apocalyptic number.

2131230020 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 2131230020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2296728000).

2131230020 is an abundant number, since it is smaller than the sum of its proper divisors (2462225980).

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

2131230020 is a wasteful number, since it uses less digits than its factorization.

2131230020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988 (or 4986 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2131230020 is about 46165.2468855090. The cubic root of 2131230020 is about 1286.8959722981.

Adding to 2131230020 its reverse (200321312), we get a palindrome (2331551332).

The spelling of 2131230020 in words is "two billion, one hundred thirty-one million, two hundred thirty thousand, twenty".