18040017405 has 8 divisors (see below), whose sum is σ = 28864027872. Its totient is φ = 9621342608.

The previous prime is 18040017403. The next prime is 18040017431. The reversal of 18040017405 is 50471004081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18040017405 - 2¹ = 18040017403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040017403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601333899 + ... + 601333928.

It is an arithmetic number, because the mean of its divisors is an integer number (3608003484).

Almost surely, 2^18040017405 is an apocalyptic number.

18040017405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18040017405 is a deficient number, since it is larger than the sum of its proper divisors (10824010467).

18040017405 is a wasteful number, since it uses less digits than its factorization.

18040017405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202667835.

The product of its (nonzero) digits is 4480, while the sum is 30.

The spelling of 18040017405 in words is "eighteen billion, forty million, seventeen thousand, four hundred five".