18484395503 has 4 divisors (see below), whose sum is σ = 21125023440. Its totient is φ = 15843767568.

The previous prime is 18484395439. The next prime is 18484395539. The reversal of 18484395503 is 30559348481.

It is a happy number.

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 18484395503 - 2⁶ = 18484395439 is a prime.

It is a super-2 number, since 2×18484395503² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18484695503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320313958 + ... + 1320313971.

It is an arithmetic number, because the mean of its divisors is an integer number (5281255860).

Almost surely, 2^18484395503 is an apocalyptic number.

18484395503 is a deficient number, since it is larger than the sum of its proper divisors (2640627937).

18484395503 is an equidigital number, since it uses as much as digits as its factorization.

18484395503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640627936.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 18484395503 in words is "eighteen billion, four hundred eighty-four million, three hundred ninety-five thousand, five hundred three".