20211431313 has 4 divisors (see below), whose sum is σ = 26948575088. Its totient is φ = 13474287540.

The previous prime is 20211431311. The next prime is 20211431321. The reversal of 20211431313 is 31313411202.

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 not a de Polignac number, because 20211431313 - 2¹ = 20211431311 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 20211431313.

It is not an unprimeable number, because it can be changed into a prime (20211431311) 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, 3368571883 + ... + 3368571888.

It is an arithmetic number, because the mean of its divisors is an integer number (6737143772).

Almost surely, 2^20211431313 is an apocalyptic number.

It is an amenable number.

20211431313 is a deficient number, since it is larger than the sum of its proper divisors (6737143775).

20211431313 is an equidigital number, since it uses as much as digits as its factorization.

20211431313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737143774.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20211431313 its reverse (31313411202), we get a palindrome (51524842515).

The spelling of 20211431313 in words is "twenty billion, two hundred eleven million, four hundred thirty-one thousand, three hundred thirteen".