2180016001836 has 144 divisors (see below), whose sum is σ = 5769790266240. Its totient is φ = 693300695040.

The previous prime is 2180016001811. The next prime is 2180016001873. The reversal of 2180016001836 is 6381006100812.

2180016001836 is a `hidden beast` number, since 2 + 1 + 8 + 0 + 0 + 1 + 600 + 18 + 36 = 666.

It is a super-2 number, since 2×2180016001836² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2180016001836.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89963370 + ... + 89987598.

It is an arithmetic number, because the mean of its divisors is an integer number (40067987960).

Almost surely, 2^{2180016001836} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2180016001836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2884895133120).

2180016001836 is an abundant number, since it is smaller than the sum of its proper divisors (3589774264404).

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

2180016001836 is a wasteful number, since it uses less digits than its factorization.

2180016001836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25624 (or 25619 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 2180016001836 in words is "two trillion, one hundred eighty billion, sixteen million, one thousand, eight hundred thirty-six".