18279148880 has 20 divisors (see below), whose sum is σ = 42499021332. Its totient is φ = 7311659520.

The previous prime is 18279148861. The next prime is 18279148883. The reversal of 18279148880 is 8884197281.

It can be written as a sum of positive squares in 2 ways, for example, as 2097273616 + 16181875264 = 45796^2 + 127208^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18279148883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114244601 + ... + 114244760.

Almost surely, 2^18279148880 is an apocalyptic number.

18279148880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18279148880 is an abundant number, since it is smaller than the sum of its proper divisors (24219872452).

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

18279148880 is a wasteful number, since it uses less digits than its factorization.

18279148880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228489374 (or 228489368 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 56.

The spelling of 18279148880 in words is "eighteen billion, two hundred seventy-nine million, one hundred forty-eight thousand, eight hundred eighty".