18643654028 has 12 divisors (see below), whose sum is σ = 32642087352. Its totient is φ = 9317343360.

The previous prime is 18643653997. The next prime is 18643654063. The reversal of 18643654028 is 82045634681.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 1111550 + ... + 1128197.

It is an arithmetic number, because the mean of its divisors is an integer number (2720173946).

Almost surely, 2^18643654028 is an apocalyptic number.

It is an amenable number.

18643654028 is a deficient number, since it is larger than the sum of its proper divisors (13998433324).

18643654028 is a wasteful number, since it uses less digits than its factorization.

18643654028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241832 (or 2241830 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 18643654028 in words is "eighteen billion, six hundred forty-three million, six hundred fifty-four thousand, twenty-eight".