18200018204 has 12 divisors (see below), whose sum is σ = 32131891344. Its totient is φ = 9019477824.

The previous prime is 18200018201. The next prime is 18200018209. The reversal of 18200018204 is 40281000281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18200018201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20132312 + ... + 20133215.

It is an arithmetic number, because the mean of its divisors is an integer number (2677657612).

Almost surely, 2^18200018204 is an apocalyptic number.

It is an amenable number.

18200018204 is a deficient number, since it is larger than the sum of its proper divisors (13931873140).

18200018204 is a wasteful number, since it uses less digits than its factorization.

18200018204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40265644 (or 40265642 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 18200018204 its reverse (40281000281), we get a palindrome (58481018485).

The spelling of 18200018204 in words is "eighteen billion, two hundred million, eighteen thousand, two hundred four".