2189743701984 has 120 divisors (see below), whose sum is σ = 6454648403280. Its totient is φ = 728251513344.

The previous prime is 2189743701983. The next prime is 2189743701989. The reversal of 2189743701984 is 4891073479812.

2189743701984 is a `hidden beast` number, since 2 + 1 + 8 + 9 + 7 + 437 + 0 + 198 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189743701983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 175692 + ... + 2100084.

It is an arithmetic number, because the mean of its divisors is an integer number (53788736694).

Almost surely, 2^{2189743701984} is an apocalyptic number.

2189743701984 is a gapful number since it is divisible by the number (24) 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 2189743701984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3227324201640).

2189743701984 is an abundant number, since it is smaller than the sum of its proper divisors (4264904701296).

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

2189743701984 is a wasteful number, since it uses less digits than its factorization.

2189743701984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924854 (or 1924837 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 2189743701984 in words is "two trillion, one hundred eighty-nine billion, seven hundred forty-three million, seven hundred one thousand, nine hundred eighty-four".