18240944605 has 16 divisors (see below), whose sum is σ = 23648736384. Its totient is φ = 13426908480.

The previous prime is 18240944591. The next prime is 18240944609. The reversal of 18240944605 is 50644904281.

It is not a de Polignac number, because 18240944605 - 2⁵ = 18240944573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240944609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430959 + ... + 471388.

It is an arithmetic number, because the mean of its divisors is an integer number (1478046024).

Almost surely, 2^18240944605 is an apocalyptic number.

It is an amenable number.

18240944605 is a deficient number, since it is larger than the sum of its proper divisors (5407791779).

18240944605 is a wasteful number, since it uses less digits than its factorization.

18240944605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902676.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 18240944605 in words is "eighteen billion, two hundred forty million, nine hundred forty-four thousand, six hundred five".