18218628740 has 48 divisors (see below), whose sum is σ = 41347887168. Its totient is φ = 6703081344.

The previous prime is 18218628721. The next prime is 18218628787. The reversal of 18218628740 is 4782681281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50222 + ... + 197381.

It is an arithmetic number, because the mean of its divisors is an integer number (861414316).

Almost surely, 2^18218628740 is an apocalyptic number.

18218628740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18218628740 is an abundant number, since it is smaller than the sum of its proper divisors (23129258428).

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

18218628740 is a wasteful number, since it uses less digits than its factorization.

18218628740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247908 (or 247906 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 18218628740 in words is "eighteen billion, two hundred eighteen million, six hundred twenty-eight thousand, seven hundred forty".