18202102221 has 8 divisors (see below), whose sum is σ = 24273840544. Its totient is φ = 12132549360.

The previous prime is 18202102211. The next prime is 18202102231. The reversal of 18202102221 is 12220120281.

It is an interprime number because it is at equal distance from previous prime (18202102211) and next prime (18202102231).

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

It is not a de Polignac number, because 18202102221 - 2¹¹ = 18202100173 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 (18202102211) 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, 526831 + ... + 560316.

It is an arithmetic number, because the mean of its divisors is an integer number (3034230068).

Almost surely, 2^18202102221 is an apocalyptic number.

It is an amenable number.

18202102221 is a deficient number, since it is larger than the sum of its proper divisors (6071738323).

18202102221 is a wasteful number, since it uses less digits than its factorization.

18202102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092731.

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 18202102221 in words is "eighteen billion, two hundred two million, one hundred two thousand, two hundred twenty-one".