20313311003 has 4 divisors (see below), whose sum is σ = 20385600648. Its totient is φ = 20241021360.

The previous prime is 20313310993. The next prime is 20313311023. The reversal of 20313311003 is 30011331302.

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 20313311003 - 2¹⁴ = 20313294619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313311023) 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, 36144401 + ... + 36144962.

It is an arithmetic number, because the mean of its divisors is an integer number (5096400162).

Almost surely, 2^20313311003 is an apocalyptic number.

20313311003 is a deficient number, since it is larger than the sum of its proper divisors (72289645).

20313311003 is an equidigital number, since it uses as much as digits as its factorization.

20313311003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72289644.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 20313311003 its reverse (30011331302), we get a palindrome (50324642305).

The spelling of 20313311003 in words is "twenty billion, three hundred thirteen million, three hundred eleven thousand, three".