18388383401 has 4 divisors (see below), whose sum is σ = 18421045392. Its totient is φ = 18355721412.

The previous prime is 18388383373. The next prime is 18388383451. The reversal of 18388383401 is 10438388381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18388383401 - 2¹⁴ = 18388367017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18388383451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16330151 + ... + 16331276.

It is an arithmetic number, because the mean of its divisors is an integer number (4605261348).

Almost surely, 2^18388383401 is an apocalyptic number.

It is an amenable number.

18388383401 is a deficient number, since it is larger than the sum of its proper divisors (32661991).

18388383401 is an equidigital number, since it uses as much as digits as its factorization.

18388383401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32661990.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 18388383401 in words is "eighteen billion, three hundred eighty-eight million, three hundred eighty-three thousand, four hundred one".