18474389284665 has 16 divisors (see below), whose sum is σ = 29559170203200. Its totient is φ = 9852958502592.

The previous prime is 18474389284661. The next prime is 18474389284669. The reversal of 18474389284665 is 56648298347481.

It is an interprime number because it is at equal distance from previous prime (18474389284661) and next prime (18474389284669).

It is not a de Polignac number, because 18474389284665 - 2² = 18474389284661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18474389284661) 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, 148506 + ... + 6080364.

It is an arithmetic number, because the mean of its divisors is an integer number (1847448137700).

Almost surely, 2^{18474389284665} is an apocalyptic number.

18474389284665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18474389284665 is a deficient number, since it is larger than the sum of its proper divisors (11084780918535).

18474389284665 is a wasteful number, since it uses less digits than its factorization.

18474389284665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139496.

The product of its digits is 2229534720, while the sum is 75.

The spelling of 18474389284665 in words is "eighteen trillion, four hundred seventy-four billion, three hundred eighty-nine million, two hundred eighty-four thousand, six hundred sixty-five".