2196037818 has 160 divisors (see below), whose sum is σ = 5622114960. Its totient is φ = 635765760.

The previous prime is 2196037793. The next prime is 2196037843. The reversal of 2196037818 is 8187306912.

2196037818 is a `hidden beast` number, since 21 + 9 + 603 + 7 + 8 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (2196037793) and next prime (2196037843).

It can be written as a sum of positive squares in 8 ways, for example, as 521345889 + 1674691929 = 22833^2 + 40923^2 .

It is a super-2 number, since 2×2196037818² = 9645164196172402248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2503596 + ... + 2504472.

Almost surely, 2^2196037818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2196037818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2811057480).

2196037818 is an abundant number, since it is smaller than the sum of its proper divisors (3426077142).

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

2196037818 is a wasteful number, since it uses less digits than its factorization.

2196037818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2196037818 is about 46861.9015619298. The cubic root of 2196037818 is about 1299.8101928013.

The spelling of 2196037818 in words is "two billion, one hundred ninety-six million, thirty-seven thousand, eight hundred eighteen".