2011071620 has 12 divisors (see below), whose sum is σ = 4223250444. Its totient is φ = 804428640.

The previous prime is 2011071617. The next prime is 2011071641. The reversal of 2011071620 is 261701102.

It can be written as a sum of positive squares in 2 ways, for example, as 766957636 + 1244113984 = 27694^2 + 35272^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 100553581 = 2011071620 / (2 + 0 + 1 + 1 + 0 + 7 + 1 + 6 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2011071592 and 2011071601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50276771 + ... + 50276810.

It is an arithmetic number, because the mean of its divisors is an integer number (351937537).

Almost surely, 2^2011071620 is an apocalyptic number.

2011071620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011071620 is an abundant number, since it is smaller than the sum of its proper divisors (2212178824).

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

2011071620 is a wasteful number, since it uses less digits than its factorization.

2011071620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100553590 (or 100553588 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 2011071620 is about 44844.9731854084. The cubic root of 2011071620 is about 1262.2416674979.

Adding to 2011071620 its reverse (261701102), we get a palindrome (2272772722).

The spelling of 2011071620 in words is "two billion, eleven million, seventy-one thousand, six hundred twenty".