18017442415 has 16 divisors (see below), whose sum is σ = 25312311360. Its totient is φ = 12053479680.

The previous prime is 18017442353. The next prime is 18017442439. The reversal of 18017442415 is 51424471081.

It is a happy number.

It is not a de Polignac number, because 18017442415 - 2⁹ = 18017441903 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6276420 + ... + 6279289.

It is an arithmetic number, because the mean of its divisors is an integer number (1582019460).

Almost surely, 2^18017442415 is an apocalyptic number.

18017442415 is a deficient number, since it is larger than the sum of its proper divisors (7294868945).

18017442415 is a wasteful number, since it uses less digits than its factorization.

18017442415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12555762.

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 18017442415 in words is "eighteen billion, seventeen million, four hundred forty-two thousand, four hundred fifteen".