2181104413443 has 24 divisors (see below), whose sum is σ = 3178303731200. Its totient is φ = 1441275099264.

The previous prime is 2181104413361. The next prime is 2181104413519. The reversal of 2181104413443 is 3443144011812.

2181104413443 is a `hidden beast` number, since 2 + 181 + 1 + 0 + 441 + 34 + 4 + 3 = 666.

It is not a de Polignac number, because 2181104413443 - 2¹⁶ = 2181104347907 is a prime.

It is a super-2 number, since 2×2181104413443² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2181104413398 and 2181104413407.

It is not an unprimeable number, because it can be changed into a prime (2181104413343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1309123 + ... + 2464956.

Almost surely, 2^{2181104413443} is an apocalyptic number.

2181104413443 is a deficient number, since it is larger than the sum of its proper divisors (997199317757).

2181104413443 is a wasteful number, since it uses less digits than its factorization.

2181104413443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774651 (or 3774648 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 2181104413443 in words is "two trillion, one hundred eighty-one billion, one hundred four million, four hundred thirteen thousand, four hundred forty-three".