20313021005 has 4 divisors (see below), whose sum is σ = 24375625212. Its totient is φ = 16250416800.

The previous prime is 20313020951. The next prime is 20313021031. The reversal of 20313021005 is 50012031302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12569548996 + 7743472009 = 112114^2 + 87997^2 .

It is not a de Polignac number, because 20313021005 - 2¹⁸ = 20312758861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031302096 + ... + 2031302105.

It is an arithmetic number, because the mean of its divisors is an integer number (6093906303).

Almost surely, 2^20313021005 is an apocalyptic number.

It is an amenable number.

20313021005 is a deficient number, since it is larger than the sum of its proper divisors (4062604207).

20313021005 is an equidigital number, since it uses as much as digits as its factorization.

20313021005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062604206.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 20313021005 its reverse (50012031302), we get a palindrome (70325052307).

The spelling of 20313021005 in words is "twenty billion, three hundred thirteen million, twenty-one thousand, five".