20131002403 has 2 divisors, whose sum is σ = 20131002404. Its totient is φ = 20131002402.

The previous prime is 20131002389. The next prime is 20131002407. The reversal of 20131002403 is 30420013102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20131002403 - 2²⁵ = 20097447971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20131002407) 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 as a sum of consecutive naturals, namely, 10065501201 + 10065501202.

It is an arithmetic number, because the mean of its divisors is an integer number (10065501202).

Almost surely, 2^20131002403 is an apocalyptic number.

20131002403 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131002403 is an equidigital number, since it uses as much as digits as its factorization.

20131002403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20131002403 its reverse (30420013102), we get a palindrome (50551015505).

The spelling of 20131002403 in words is "twenty billion, one hundred thirty-one million, two thousand, four hundred three".