18634184648 has 16 divisors (see below), whose sum is σ = 35148314880. Its totient is φ = 9261300688.

The previous prime is 18634184641. The next prime is 18634184651. The reversal of 18634184648 is 84648143681.

It is a self number, because there is not a number n which added to its sum of digits gives 18634184648.

It is not an unprimeable number, because it can be changed into a prime (18634184641) 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, 6972536 + ... + 6975207.

It is an arithmetic number, because the mean of its divisors is an integer number (2196769680).

Almost surely, 2^18634184648 is an apocalyptic number.

It is an amenable number.

18634184648 is a deficient number, since it is larger than the sum of its proper divisors (16514130232).

18634184648 is a wasteful number, since it uses less digits than its factorization.

18634184648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13947916 (or 13947912 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 53.

The spelling of 18634184648 in words is "eighteen billion, six hundred thirty-four million, one hundred eighty-four thousand, six hundred forty-eight".