20620366243 has 4 divisors (see below), whose sum is σ = 21099909688. Its totient is φ = 20140822800.

The previous prime is 20620366241. The next prime is 20620366253. The reversal of 20620366243 is 34266302602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20620366243 - 2¹ = 20620366241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20620366199 and 20620366208.

It is not an unprimeable number, because it can be changed into a prime (20620366241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239771658 + ... + 239771743.

It is an arithmetic number, because the mean of its divisors is an integer number (5274977422).

Almost surely, 2^20620366243 is an apocalyptic number.

20620366243 is a deficient number, since it is larger than the sum of its proper divisors (479543445).

20620366243 is an equidigital number, since it uses as much as digits as its factorization.

20620366243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479543444.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 20620366243 its reverse (34266302602), we get a palindrome (54886668845).

The spelling of 20620366243 in words is "twenty billion, six hundred twenty million, three hundred sixty-six thousand, two hundred forty-three".