18213729160 has 64 divisors (see below), whose sum is σ = 45245148480. Its totient is φ = 6543363840.

The previous prime is 18213729089. The next prime is 18213729271. The reversal of 18213729160 is 6192731281.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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, 212847 + ... + 285886.

It is an arithmetic number, because the mean of its divisors is an integer number (706955445).

Almost surely, 2^18213729160 is an apocalyptic number.

18213729160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18213729160 is an abundant number, since it is smaller than the sum of its proper divisors (27031419320).

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

18213729160 is a wasteful number, since it uses less digits than its factorization.

18213729160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498838 (or 498834 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 18213729160 in words is "eighteen billion, two hundred thirteen million, seven hundred twenty-nine thousand, one hundred sixty".