18071664500 has 48 divisors (see below), whose sum is σ = 40308323328. Its totient is φ = 7074855200.

The previous prime is 18071664497. The next prime is 18071664509. The reversal of 18071664500 is 546617081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18071664509) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 361004 + ... + 408003.

It is an arithmetic number, because the mean of its divisors is an integer number (839756736).

Almost surely, 2^18071664500 is an apocalyptic number.

18071664500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18071664500 is an abundant number, since it is smaller than the sum of its proper divisors (22236658828).

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

18071664500 is a wasteful number, since it uses less digits than its factorization.

18071664500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769073 (or 769061 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 18071664500 in words is "eighteen billion, seventy-one million, six hundred sixty-four thousand, five hundred".