20311224413 has 4 divisors (see below), whose sum is σ = 20382995808. Its totient is φ = 20239453020.

The previous prime is 20311224377. The next prime is 20311224433. The reversal of 20311224413 is 31442211302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20311224413 - 2¹⁶ = 20311158877 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 (20311224433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35885273 + ... + 35885838.

It is an arithmetic number, because the mean of its divisors is an integer number (5095748952).

Almost surely, 2^20311224413 is an apocalyptic number.

It is an amenable number.

20311224413 is a deficient number, since it is larger than the sum of its proper divisors (71771395).

20311224413 is an equidigital number, since it uses as much as digits as its factorization.

20311224413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71771394.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20311224413 its reverse (31442211302), we get a palindrome (51753435715).

The spelling of 20311224413 in words is "twenty billion, three hundred eleven million, two hundred twenty-four thousand, four hundred thirteen".