18211018201 has 16 divisors (see below), whose sum is σ = 18682700544. Its totient is φ = 17744523264.

The previous prime is 18211018183. The next prime is 18211018207. The reversal of 18211018201 is 10281011281.

It is a cyclic number.

It is not a de Polignac number, because 18211018201 - 2¹⁹ = 18210493913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18211018207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4997086 + ... + 5000728.

It is an arithmetic number, because the mean of its divisors is an integer number (1167668784).

Almost surely, 2^18211018201 is an apocalyptic number.

It is an amenable number.

18211018201 is a deficient number, since it is larger than the sum of its proper divisors (471682343).

18211018201 is a wasteful number, since it uses less digits than its factorization.

18211018201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320.

The product of its (nonzero) digits is 256, while the sum is 25.

Adding to 18211018201 its reverse (10281011281), we get a palindrome (28492029482).

The spelling of 18211018201 in words is "eighteen billion, two hundred eleven million, eighteen thousand, two hundred one".