18170856880 has 160 divisors (see below), whose sum is σ = 47559723840. Its totient is φ = 6398300160.

The previous prime is 18170856877. The next prime is 18170856883. The reversal of 18170856880 is 8865807181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18170856877) and next prime (18170856883).

It is not an unprimeable number, because it can be changed into a prime (18170856883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7455022 + ... + 7457458.

It is an arithmetic number, because the mean of its divisors is an integer number (297248274).

Almost surely, 2^18170856880 is an apocalyptic number.

18170856880 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 18170856880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23779861920).

18170856880 is an abundant number, since it is smaller than the sum of its proper divisors (29388866960).

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

18170856880 is a wasteful number, since it uses less digits than its factorization.

18170856880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727 (or 2721 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 52.

The spelling of 18170856880 in words is "eighteen billion, one hundred seventy million, eight hundred fifty-six thousand, eight hundred eighty".