18216559230 has 32 divisors (see below), whose sum is σ = 43723389600. Its totient is φ = 4857343872.

The previous prime is 18216559223. The next prime is 18216559261. The reversal of 18216559230 is 3295561281.

It is a congruent number.

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, 568476 + ... + 599664.

It is an arithmetic number, because the mean of its divisors is an integer number (1366355925).

Almost surely, 2^18216559230 is an apocalyptic number.

18216559230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18216559230 is an abundant number, since it is smaller than the sum of its proper divisors (25506830370).

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

18216559230 is a wasteful number, since it uses less digits than its factorization.

18216559230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50668.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 18216559230 in words is "eighteen billion, two hundred sixteen million, five hundred fifty-nine thousand, two hundred thirty".