20313100243 has 4 divisors (see below), whose sum is σ = 20397387208. Its totient is φ = 20228813280.

The previous prime is 20313100211. The next prime is 20313100303. The reversal of 20313100243 is 34200131302.

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 20313100243 - 2⁵ = 20313100211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20313100243.

It is not an unprimeable number, because it can be changed into a prime (20313100043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42143121 + ... + 42143602.

It is an arithmetic number, because the mean of its divisors is an integer number (5099346802).

Almost surely, 2^20313100243 is an apocalyptic number.

20313100243 is a deficient number, since it is larger than the sum of its proper divisors (84286965).

20313100243 is an equidigital number, since it uses as much as digits as its factorization.

20313100243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84286964.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20313100243 its reverse (34200131302), we get a palindrome (54513231545).

The spelling of 20313100243 in words is "twenty billion, three hundred thirteen million, one hundred thousand, two hundred forty-three".