18229391080 has 64 divisors (see below), whose sum is σ = 41453874000. Its totient is φ = 7214137344.

The previous prime is 18229390961. The next prime is 18229391093. The reversal of 18229391080 is 8019392281.

It can be written as a sum of positive squares in 8 ways, for example, as 9257133796 + 8972257284 = 96214^2 + 94722^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3350122 + ... + 3355558.

Almost surely, 2^18229391080 is an apocalyptic number.

18229391080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18229391080 is an abundant number, since it is smaller than the sum of its proper divisors (23224482920).

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

18229391080 is a wasteful number, since it uses less digits than its factorization.

18229391080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6326 (or 6322 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 18229391080 in words is "eighteen billion, two hundred twenty-nine million, three hundred ninety-one thousand, eighty".