18512211102213 has 8 divisors (see below), whose sum is σ = 24684891267328. Its totient is φ = 12340502502624.

The previous prime is 18512211102197. The next prime is 18512211102241. The reversal of 18512211102213 is 31220111221581.

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

It is not a de Polignac number, because 18512211102213 - 2⁴ = 18512211102197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18512211102283) 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, 242846920 + ... + 242923137.

It is an arithmetic number, because the mean of its divisors is an integer number (3085611408416).

Almost surely, 2^{18512211102213} is an apocalyptic number.

It is an amenable number.

18512211102213 is a deficient number, since it is larger than the sum of its proper divisors (6172680165115).

18512211102213 is a wasteful number, since it uses less digits than its factorization.

18512211102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485782763.

The product of its (nonzero) digits is 1920, while the sum is 30.

Adding to 18512211102213 its reverse (31220111221581), we get a palindrome (49732322323794).

The spelling of 18512211102213 in words is "eighteen trillion, five hundred twelve billion, two hundred eleven million, one hundred two thousand, two hundred thirteen".