2113123020 has 24 divisors (see below), whose sum is σ = 5916744624. Its totient is φ = 563499456.

The previous prime is 2113123009. The next prime is 2113123027. The reversal of 2113123020 is 203213112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (2113123027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17609299 + ... + 17609418.

It is an arithmetic number, because the mean of its divisors is an integer number (246531026).

Almost surely, 2^2113123020 is an apocalyptic number.

2113123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113123020 is an abundant number, since it is smaller than the sum of its proper divisors (3803621604).

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

2113123020 is a wasteful number, since it uses less digits than its factorization.

2113123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35218729 (or 35218727 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2113123020 is about 45968.7178415931. The cubic root of 2113123020 is about 1283.2410985978.

Adding to 2113123020 its reverse (203213112), we get a palindrome (2316336132).

The spelling of 2113123020 in words is "two billion, one hundred thirteen million, one hundred twenty-three thousand, twenty".