20213113324243 has 16 divisors (see below), whose sum is σ = 24317260107520. Its totient is φ = 16413161292576.

The previous prime is 20213113324241. The next prime is 20213113324267. The reversal of 20213113324243 is 34242331131202.

It is a cyclic number.

It is not a de Polignac number, because 20213113324243 - 2¹ = 20213113324241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213113324241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2172505 + ... + 6719077.

It is an arithmetic number, because the mean of its divisors is an integer number (1519828756720).

Almost surely, 2^{20213113324243} is an apocalyptic number.

20213113324243 is a deficient number, since it is larger than the sum of its proper divisors (4104146783277).

20213113324243 is a wasteful number, since it uses less digits than its factorization.

20213113324243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580026.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 20213113324243 its reverse (34242331131202), we get a palindrome (54455444455445).

The spelling of 20213113324243 in words is "twenty trillion, two hundred thirteen billion, one hundred thirteen million, three hundred twenty-four thousand, two hundred forty-three".