18279843945 has 32 divisors (see below), whose sum is σ = 32265164160. Its totient is φ = 8763363840.

The previous prime is 18279843943. The next prime is 18279843947. The reversal of 18279843945 is 54934897281.

It is an interprime number because it is at equal distance from previous prime (18279843943) and next prime (18279843947).

It is not a de Polignac number, because 18279843945 - 2¹ = 18279843943 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18279843943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 607714 + ... + 637083.

It is an arithmetic number, because the mean of its divisors is an integer number (1008286380).

Almost surely, 2^18279843945 is an apocalyptic number.

18279843945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18279843945 is a deficient number, since it is larger than the sum of its proper divisors (13985320215).

18279843945 is a wasteful number, since it uses less digits than its factorization.

18279843945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244905.

The product of its digits is 17418240, while the sum is 60.

The spelling of 18279843945 in words is "eighteen billion, two hundred seventy-nine million, eight hundred forty-three thousand, nine hundred forty-five".