2071818 has 84 divisors (see below), whose sum is σ = 5607090. Its totient is φ = 571536.

The previous prime is 2071801. The next prime is 2071819. The reversal of 2071818 is 8181702.

It can be written as a sum of positive squares in only one way, i.e., 1750329 + 321489 = 1323^2 + 567^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2071791 and 2071800.

It is not an unprimeable number, because it can be changed into a prime (2071819) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 71428 + ... + 71456.

2^2071818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2071818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2803545).

2071818 is an abundant number, since it is smaller than the sum of its proper divisors (3535272).

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

2071818 is an equidigital number, since it uses as much as digits as its factorization.

2071818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 2071818 is about 1439.3811170083. The cubic root of 2071818 is about 127.4824889446.

It can be divided in two parts, 20718 and 18, that added together give a 4-th power (20736 = 12⁴).

The spelling of 2071818 in words is "two million, seventy-one thousand, eight hundred eighteen".