18729805164 has 48 divisors (see below), whose sum is σ = 49997488128. Its totient is φ = 5345872128.

The previous prime is 18729805147. The next prime is 18729805189. The reversal of 18729805164 is 46150892781.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32044 + ... + 196179.

It is an arithmetic number, because the mean of its divisors is an integer number (1041614336).

Almost surely, 2^18729805164 is an apocalyptic number.

18729805164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18729805164 is an abundant number, since it is smaller than the sum of its proper divisors (31267682964).

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

18729805164 is a wasteful number, since it uses less digits than its factorization.

18729805164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229214 (or 229212 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 18729805164 in words is "eighteen billion, seven hundred twenty-nine million, eight hundred five thousand, one hundred sixty-four".