2186204816940 has 96 divisors (see below), whose sum is σ = 6209425474560. Its totient is φ = 574606905600.

The previous prime is 2186204816909. The next prime is 2186204816951. The reversal of 2186204816940 is 496184026812.

It is a super-2 number, since 2×2186204816940² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14669721 + ... + 14817999.

It is an arithmetic number, because the mean of its divisors is an integer number (64681515360).

Almost surely, 2^{2186204816940} is an apocalyptic number.

2186204816940 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 2186204816940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3104712737280).

2186204816940 is an abundant number, since it is smaller than the sum of its proper divisors (4023220657620).

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

2186204816940 is a wasteful number, since it uses less digits than its factorization.

2186204816940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151823 (or 151821 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 2186204816940 in words is "two trillion, one hundred eighty-six billion, two hundred four million, eight hundred sixteen thousand, nine hundred forty".