18613504016 has 10 divisors (see below), whose sum is σ = 36063664062. Its totient is φ = 9306752000.

The previous prime is 18613504001. The next prime is 18613504037. The reversal of 18613504016 is 61040531681.

It can be written as a sum of positive squares in only one way, i.e., 15751254016 + 2862250000 = 125504^2 + 53500^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581671985 + ... + 581672016.

Almost surely, 2^18613504016 is an apocalyptic number.

18613504016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18613504016 is a deficient number, since it is larger than the sum of its proper divisors (17450160046).

18613504016 is a wasteful number, since it uses less digits than its factorization.

18613504016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163344009 (or 1163344003 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 18613504016 in words is "eighteen billion, six hundred thirteen million, five hundred four thousand, sixteen".