18102212213 has 8 divisors (see below), whose sum is σ = 18128539800. Its totient is φ = 18075904000.

The previous prime is 18102212159. The next prime is 18102212237. The reversal of 18102212213 is 31221220181.

It can be written as a sum of positive squares in 4 ways, for example, as 17076739684 + 1025472529 = 130678^2 + 32023^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18102212213 - 2¹⁰ = 18102211189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18102212273) 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, 3287963 + ... + 3293463.

It is an arithmetic number, because the mean of its divisors is an integer number (2266067475).

Almost surely, 2^18102212213 is an apocalyptic number.

It is an amenable number.

18102212213 is a deficient number, since it is larger than the sum of its proper divisors (26327587).

18102212213 is a wasteful number, since it uses less digits than its factorization.

18102212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9687.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 18102212213 its reverse (31221220181), we get a palindrome (49323432394).

The spelling of 18102212213 in words is "eighteen billion, one hundred two million, two hundred twelve thousand, two hundred thirteen".