21218482213 has 8 divisors (see below), whose sum is σ = 21621168000. Its totient is φ = 20815883088.

The previous prime is 21218482163. The next prime is 21218482223. The reversal of 21218482213 is 31228481212.

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 21218482213 - 2¹³ = 21218474021 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 (21218482223) 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, 695208 + ... + 725086.

It is an arithmetic number, because the mean of its divisors is an integer number (2702646000).

Almost surely, 2^21218482213 is an apocalyptic number.

It is an amenable number.

21218482213 is a deficient number, since it is larger than the sum of its proper divisors (402685787).

21218482213 is a wasteful number, since it uses less digits than its factorization.

21218482213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43331.

The product of its digits is 12288, while the sum is 34.

The spelling of 21218482213 in words is "twenty-one billion, two hundred eighteen million, four hundred eighty-two thousand, two hundred thirteen".