18280958220 has 216 divisors, whose sum is σ = 65724435504. Its totient is φ = 4099560192.

The previous prime is 18280958219. The next prime is 18280958251. The reversal of 18280958220 is 2285908281.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 447907 + ... + 487013.

It is an arithmetic number, because the mean of its divisors is an integer number (304279794).

Almost surely, 2^18280958220 is an apocalyptic number.

18280958220 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 18280958220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32862217752).

18280958220 is an abundant number, since it is smaller than the sum of its proper divisors (47443477284).

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

18280958220 is a wasteful number, since it uses less digits than its factorization.

18280958220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39189 (or 39177 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 18280958220 in words is "eighteen billion, two hundred eighty million, nine hundred fifty-eight thousand, two hundred twenty".