20131023103 has 2 divisors, whose sum is σ = 20131023104. Its totient is φ = 20131023102.

The previous prime is 20131023091. The next prime is 20131023109. The reversal of 20131023103 is 30132013102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20131023103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131023109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065511551 + 10065511552.

It is an arithmetic number, because the mean of its divisors is an integer number (10065511552).

Almost surely, 2^20131023103 is an apocalyptic number.

20131023103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131023103 is an equidigital number, since it uses as much as digits as its factorization.

20131023103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20131023103 its reverse (30132013102), we get a palindrome (50263036205).

The spelling of 20131023103 in words is "twenty billion, one hundred thirty-one million, twenty-three thousand, one hundred three".