18117371020 has 48 divisors (see below), whose sum is σ = 43500199680. Its totient is φ = 6209025984.

The previous prime is 18117370967. The next prime is 18117371023. The reversal of 18117371020 is 2017371181.

It is not an unprimeable number, because it can be changed into a prime (18117371023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317947 + ... + 370573.

It is an arithmetic number, because the mean of its divisors is an integer number (906254160).

Almost surely, 2^18117371020 is an apocalyptic number.

18117371020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18117371020 is an abundant number, since it is smaller than the sum of its proper divisors (25382828660).

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

18117371020 is a wasteful number, since it uses less digits than its factorization.

18117371020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55102 (or 55100 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 31.

The spelling of 18117371020 in words is "eighteen billion, one hundred seventeen million, three hundred seventy-one thousand, twenty".