43091384018 has 4 divisors (see below), whose sum is σ = 64637076030. Its totient is φ = 21545692008.

The previous prime is 43091383969. The next prime is 43091384027. The reversal of 43091384018 is 81048319034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42620363809 + 471020209 = 206447^2 + 21703^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10772846003 + ... + 10772846006.

Almost surely, 2^43091384018 is an apocalyptic number.

43091384018 is a deficient number, since it is larger than the sum of its proper divisors (21545692012).

43091384018 is a wasteful number, since it uses less digits than its factorization.

43091384018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21545692011.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 43091384018 in words is "forty-three billion, ninety-one million, three hundred eighty-four thousand, eighteen".