18027380736 has 228 divisors, whose sum is σ = 54198692912. Its totient is φ = 5987893248.

The previous prime is 18027380719. The next prime is 18027380779. The reversal of 18027380736 is 63708372081.

18027380736 is a `hidden beast` number, since 180 + 27 + 380 + 73 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18027380691 and 18027380700.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63700851 + ... + 63701133.

Almost surely, 2^18027380736 is an apocalyptic number.

18027380736 is a gapful number since it is divisible by the number (16) 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 18027380736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27099346456).

18027380736 is an abundant number, since it is smaller than the sum of its proper divisors (36171312176).

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

18027380736 is an frugal number, since it uses more digits than its factorization.

18027380736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 18027380736 in words is "eighteen billion, twenty-seven million, three hundred eighty thousand, seven hundred thirty-six".