18611272204 has 24 divisors (see below), whose sum is σ = 38840917248. Its totient is φ = 7629465360.

The previous prime is 18611272201. The next prime is 18611272231. The reversal of 18611272204 is 40227211681.

It is a self number, because there is not a number n which added to its sum of digits gives 18611272204.

It is not an unprimeable number, because it can be changed into a prime (18611272201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14449102 + ... + 14450389.

It is an arithmetic number, because the mean of its divisors is an integer number (1618371552).

Almost surely, 2^18611272204 is an apocalyptic number.

18611272204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18611272204 is an abundant number, since it is smaller than the sum of its proper divisors (20229645044).

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

18611272204 is a wasteful number, since it uses less digits than its factorization.

18611272204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28899525 (or 28899523 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

Adding to 18611272204 its reverse (40227211681), we get a palindrome (58838483885).

The spelling of 18611272204 in words is "eighteen billion, six hundred eleven million, two hundred seventy-two thousand, two hundred four".