18403384207 has 4 divisors (see below), whose sum is σ = 19819029160. Its totient is φ = 16987739256.

The previous prime is 18403384201. The next prime is 18403384217. The reversal of 18403384207 is 70248330481.

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 18403384207 - 2²⁷ = 18269166479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18403384207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18403384201) 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, 707822457 + ... + 707822482.

It is an arithmetic number, because the mean of its divisors is an integer number (4954757290).

Almost surely, 2^18403384207 is an apocalyptic number.

18403384207 is a deficient number, since it is larger than the sum of its proper divisors (1415644953).

18403384207 is a wasteful number, since it uses less digits than its factorization.

18403384207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415644952.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 18403384207 in words is "eighteen billion, four hundred three million, three hundred eighty-four thousand, two hundred seven".