20313031011 has 16 divisors (see below), whose sum is σ = 33334205184. Its totient is φ = 10714565664.

The previous prime is 20313030961. The next prime is 20313031031. The reversal of 20313031011 is 11013031302.

It is not a de Polignac number, because 20313031011 - 2⁷ = 20313030883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20313031031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37203081 + ... + 37203626.

It is an arithmetic number, because the mean of its divisors is an integer number (2083387824).

Almost surely, 2^20313031011 is an apocalyptic number.

20313031011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20313031011 is a deficient number, since it is larger than the sum of its proper divisors (13021174173).

20313031011 is a wasteful number, since it uses less digits than its factorization.

20313031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74406730.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 20313031011 its reverse (11013031302), we get a palindrome (31326062313).

The spelling of 20313031011 in words is "twenty billion, three hundred thirteen million, thirty-one thousand, eleven".