18618144403 has 8 divisors (see below), whose sum is σ = 20076048720. Its totient is φ = 17208040320.

The previous prime is 18618144373. The next prime is 18618144407. The reversal of 18618144403 is 30444181681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18618144403 - 2³³ = 10028209811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18618144407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11949250 + ... + 11950807.

It is an arithmetic number, because the mean of its divisors is an integer number (2509506090).

Almost surely, 2^18618144403 is an apocalyptic number.

18618144403 is a deficient number, since it is larger than the sum of its proper divisors (1457904317).

18618144403 is a wasteful number, since it uses less digits than its factorization.

18618144403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23900117.

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 18618144403 in words is "eighteen billion, six hundred eighteen million, one hundred forty-four thousand, four hundred three".