2113012020 has 48 divisors (see below), whose sum is σ = 6761639808. Its totient is φ = 482974080.

The previous prime is 2113012019. The next prime is 2113012037. The reversal of 2113012020 is 202103112.

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 = 2113011987 and 2113012005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2515071 + ... + 2515910.

It is an arithmetic number, because the mean of its divisors is an integer number (140867496).

Almost surely, 2^2113012020 is an apocalyptic number.

2113012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113012020 is an abundant number, since it is smaller than the sum of its proper divisors (4648627788).

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

2113012020 is a wasteful number, since it uses less digits than its factorization.

2113012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031000 (or 5030998 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2113012020 is about 45967.5104829487. The cubic root of 2113012020 is about 1283.2186291289.

Adding to 2113012020 its reverse (202103112), we get a palindrome (2315115132).

The spelling of 2113012020 in words is "two billion, one hundred thirteen million, twelve thousand, twenty".