18281838204 has 72 divisors (see below), whose sum is σ = 54042468480. Its totient is φ = 5101905312.

The previous prime is 18281838193. The next prime is 18281838217. The reversal of 18281838204 is 40283818281.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18281838204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 832734 + ... + 854405.

It is an arithmetic number, because the mean of its divisors is an integer number (750589840).

Almost surely, 2^18281838204 is an apocalyptic number.

18281838204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18281838204 is an abundant number, since it is smaller than the sum of its proper divisors (35760630276).

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

18281838204 is a wasteful number, since it uses less digits than its factorization.

18281838204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687199 (or 1687194 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The spelling of 18281838204 in words is "eighteen billion, two hundred eighty-one million, eight hundred thirty-eight thousand, two hundred four".