18006953616 has 80 divisors (see below), whose sum is σ = 51710132800. Its totient is φ = 5999588352.

The previous prime is 18006953603. The next prime is 18006953617. The reversal of 18006953616 is 61635960081.

It is not an unprimeable number, because it can be changed into a prime (18006953617) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1088640 + ... + 1105056.

It is an arithmetic number, because the mean of its divisors is an integer number (646376660).

Almost surely, 2^18006953616 is an apocalyptic number.

18006953616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18006953616 is an abundant number, since it is smaller than the sum of its proper divisors (33703179184).

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

18006953616 is a wasteful number, since it uses less digits than its factorization.

18006953616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18973 (or 18961 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 18006953616 in words is "eighteen billion, six million, nine hundred fifty-three thousand, six hundred sixteen".