18843539379 has 64 divisors (see below), whose sum is σ = 29939466240. Its totient is φ = 10315872000.

The previous prime is 18843539369. The next prime is 18843539399. The reversal of 18843539379 is 97393534881.

It is not a de Polignac number, because 18843539379 - 2⁹ = 18843538867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18843539359) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43720294 + ... + 43720724.

It is an arithmetic number, because the mean of its divisors is an integer number (467804160).

Almost surely, 2^18843539379 is an apocalyptic number.

18843539379 is a deficient number, since it is larger than the sum of its proper divisors (11095926861).

18843539379 is a wasteful number, since it uses less digits than its factorization.

18843539379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992.

The product of its digits is 19595520, while the sum is 60.

The spelling of 18843539379 in words is "eighteen billion, eight hundred forty-three million, five hundred thirty-nine thousand, three hundred seventy-nine".