2113571620 has 48 divisors (see below), whose sum is σ = 4615833600. Its totient is φ = 811959680.

The previous prime is 2113571617. The next prime is 2113571627. The reversal of 2113571620 is 261753112.

It is a happy number.

It is a super-3 number, since 3×2113571620³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2113571627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101241 + ... + 120319.

It is an arithmetic number, because the mean of its divisors is an integer number (96163200).

Almost surely, 2^2113571620 is an apocalyptic number.

2113571620 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 2113571620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2307916800).

2113571620 is an abundant number, since it is smaller than the sum of its proper divisors (2502261980).

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

2113571620 is a wasteful number, since it uses less digits than its factorization.

2113571620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19308 (or 19306 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2113571620 is about 45973.5969878364. The cubic root of 2113571620 is about 1283.3318996255.

The spelling of 2113571620 in words is "two billion, one hundred thirteen million, five hundred seventy-one thousand, six hundred twenty".