18116474920 has 128 divisors (see below), whose sum is σ = 43513200000. Its totient is φ = 6769032192.

The previous prime is 18116474879. The next prime is 18116474969. The reversal of 18116474920 is 2947461181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17778171 + ... + 17779189.

It is an arithmetic number, because the mean of its divisors is an integer number (339946875).

Almost surely, 2^18116474920 is an apocalyptic number.

18116474920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18116474920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21756600000).

18116474920 is an abundant number, since it is smaller than the sum of its proper divisors (25396725080).

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

18116474920 is a wasteful number, since it uses less digits than its factorization.

18116474920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1351 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 18116474920 in words is "eighteen billion, one hundred sixteen million, four hundred seventy-four thousand, nine hundred twenty".