18663254416 has 20 divisors (see below), whose sum is σ = 36194493424. Its totient is φ = 9322740000.

The previous prime is 18663254411. The next prime is 18663254417. The reversal of 18663254416 is 61445236681.

It is not an unprimeable number, because it can be changed into a prime (18663254411) 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, 538110 + ... + 571741.

Almost surely, 2^18663254416 is an apocalyptic number.

18663254416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18663254416 is a deficient number, since it is larger than the sum of its proper divisors (17531239008).

18663254416 is a wasteful number, since it uses less digits than its factorization.

18663254416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110910 (or 1110904 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The spelling of 18663254416 in words is "eighteen billion, six hundred sixty-three million, two hundred fifty-four thousand, four hundred sixteen".