2111562620 has 48 divisors (see below), whose sum is σ = 4622207520. Its totient is φ = 809512704.

The previous prime is 2111562617. The next prime is 2111562631. The reversal of 2111562620 is 262651112.

It is a self number, because there is not a number n which added to its sum of digits gives 2111562620.

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, 28286 + ... + 70874.

It is an arithmetic number, because the mean of its divisors is an integer number (96295990).

Almost surely, 2^2111562620 is an apocalyptic number.

2111562620 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 2111562620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2311103760).

2111562620 is an abundant number, since it is smaller than the sum of its proper divisors (2510644900).

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

2111562620 is a wasteful number, since it uses less digits than its factorization.

2111562620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42702 (or 42700 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2111562620 is about 45951.7422955866. The cubic root of 2111562620 is about 1282.9251582470.

The spelling of 2111562620 in words is "two billion, one hundred eleven million, five hundred sixty-two thousand, six hundred twenty".