20103013031 has 4 divisors (see below), whose sum is σ = 20593330464. Its totient is φ = 19612695600.

The previous prime is 20103013019. The next prime is 20103013079. The reversal of 20103013031 is 13031030102.

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 20103013031 - 2³⁰ = 19029271207 is a prime.

It is a super-2 number, since 2×20103013031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20103012997 and 20103013015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103019031) 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, 245158655 + ... + 245158736.

It is an arithmetic number, because the mean of its divisors is an integer number (5148332616).

Almost surely, 2^20103013031 is an apocalyptic number.

20103013031 is a deficient number, since it is larger than the sum of its proper divisors (490317433).

20103013031 is an equidigital number, since it uses as much as digits as its factorization.

20103013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490317432.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 20103013031 its reverse (13031030102), we get a palindrome (33134043133).

The spelling of 20103013031 in words is "twenty billion, one hundred three million, thirteen thousand, thirty-one".