18172774080 has 168 divisors, whose sum is σ = 63566802000. Its totient is φ = 4763891712.

The previous prime is 18172774073. The next prime is 18172774229. The reversal of 18172774080 is 8047727181.

18172774080 is a `hidden beast` number, since 1 + 8 + 172 + 77 + 408 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116446 + ... + 223394.

Almost surely, 2^18172774080 is an apocalyptic number.

18172774080 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 18172774080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31783401000).

18172774080 is an abundant number, since it is smaller than the sum of its proper divisors (45394027920).

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

18172774080 is a wasteful number, since it uses less digits than its factorization.

18172774080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107031 (or 107018 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The spelling of 18172774080 in words is "eighteen billion, one hundred seventy-two million, seven hundred seventy-four thousand, eighty".