18702218352 has 20 divisors (see below), whose sum is σ = 48314064200. Its totient is φ = 6234072768.

The previous prime is 18702218317. The next prime is 18702218363. The reversal of 18702218352 is 25381220781.

It is a self number, because there is not a number n which added to its sum of digits gives 18702218352.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 194814727 + ... + 194814822.

It is an arithmetic number, because the mean of its divisors is an integer number (2415703210).

Almost surely, 2^18702218352 is an apocalyptic number.

18702218352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18702218352 is an abundant number, since it is smaller than the sum of its proper divisors (29611845848).

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

18702218352 is a wasteful number, since it uses less digits than its factorization.

18702218352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389629560 (or 389629554 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

It can be divided in two parts, 1870 and 2218352, that added together give a palindrome (2220222).

The spelling of 18702218352 in words is "eighteen billion, seven hundred two million, two hundred eighteen thousand, three hundred fifty-two".