20313105031 has 4 divisors (see below), whose sum is σ = 20365324200. Its totient is φ = 20260885864.

The previous prime is 20313104963. The next prime is 20313105107. The reversal of 20313105031 is 13050131302.

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 20313105031 - 2²¹ = 20311007879 is a prime.

It is a super-2 number, since 2×20313105031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343105031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26109001 + ... + 26109778.

It is an arithmetic number, because the mean of its divisors is an integer number (5091331050).

Almost surely, 2^20313105031 is an apocalyptic number.

20313105031 is a deficient number, since it is larger than the sum of its proper divisors (52219169).

20313105031 is an equidigital number, since it uses as much as digits as its factorization.

20313105031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52219168.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 20313105031 its reverse (13050131302), we get a palindrome (33363236333).

The spelling of 20313105031 in words is "twenty billion, three hundred thirteen million, one hundred five thousand, thirty-one".