18032474365 has 4 divisors (see below), whose sum is σ = 21638969244. Its totient is φ = 14425979488.

The previous prime is 18032474363. The next prime is 18032474389. The reversal of 18032474365 is 56347423081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56347423081 = 29 ⋅1943014589.

It can be written as a sum of positive squares in 2 ways, for example, as 4589927001 + 13442547364 = 67749^2 + 115942^2 .

It is a cyclic number.

It is not a de Polignac number, because 18032474365 - 2¹ = 18032474363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18032474363) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1803247432 + ... + 1803247441.

It is an arithmetic number, because the mean of its divisors is an integer number (5409742311).

Almost surely, 2^18032474365 is an apocalyptic number.

It is an amenable number.

18032474365 is a deficient number, since it is larger than the sum of its proper divisors (3606494879).

18032474365 is an equidigital number, since it uses as much as digits as its factorization.

18032474365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606494878.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 18032474365 in words is "eighteen billion, thirty-two million, four hundred seventy-four thousand, three hundred sixty-five".