18165109284 has 81 divisors (see below), whose sum is σ = 53430721617. Its totient is φ = 5188413888.

The previous prime is 18165109273. The next prime is 18165109307. The reversal of 18165109284 is 48290156181.

It is a happy number.

The square root of 18165109284 is 134778.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10236987684 + 7928121600 = 101178^2 + 89040^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5659072 + ... + 5662280.

Almost surely, 2^18165109284 is an apocalyptic number.

18165109284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18165109284 is the 134778-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18165109284

18165109284 is an abundant number, since it is smaller than the sum of its proper divisors (35265612333).

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

18165109284 is an equidigital number, since it uses as much as digits as its factorization.

18165109284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442 (or 3221 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

It can be divided in two parts, 18165 and 109284, that added together give a square (127449 = 357²).

The spelling of 18165109284 in words is "eighteen billion, one hundred sixty-five million, one hundred nine thousand, two hundred eighty-four".