18032297407 has 4 divisors (see below), whose sum is σ = 18038738016. Its totient is φ = 18025856800.

The previous prime is 18032297399. The next prime is 18032297417. The reversal of 18032297407 is 70479223081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18032297407 - 2³ = 18032297399 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 (18032297417) 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, 3216103 + ... + 3221704.

It is an arithmetic number, because the mean of its divisors is an integer number (4509684504).

Almost surely, 2^18032297407 is an apocalyptic number.

18032297407 is a deficient number, since it is larger than the sum of its proper divisors (6440609).

18032297407 is an equidigital number, since it uses as much as digits as its factorization.

18032297407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6440608.

The product of its (nonzero) digits is 169344, while the sum is 43.

It can be divided in two parts, 180322 and 97407, that added together give a square (277729 = 527²).

The spelling of 18032297407 in words is "eighteen billion, thirty-two million, two hundred ninety-seven thousand, four hundred seven".