18649542984 has 16 divisors (see below), whose sum is σ = 46623857520. Its totient is φ = 6216514320.

The previous prime is 18649542983. The next prime is 18649543013. The reversal of 18649542984 is 48924594681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18649542983) 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, 388532122 + ... + 388532169.

It is an arithmetic number, because the mean of its divisors is an integer number (2913991095).

Almost surely, 2^18649542984 is an apocalyptic number.

It is an amenable number.

18649542984 is an abundant number, since it is smaller than the sum of its proper divisors (27974314536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18649542984 is a wasteful number, since it uses less digits than its factorization.

18649542984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777064300 (or 777064296 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 60.

The spelling of 18649542984 in words is "eighteen billion, six hundred forty-nine million, five hundred forty-two thousand, nine hundred eighty-four".