20402131303 has 2 divisors, whose sum is σ = 20402131304. Its totient is φ = 20402131302.

The previous prime is 20402131291. The next prime is 20402131331. The reversal of 20402131303 is 30313120402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20402131303 - 2²⁵ = 20368576871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402131703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201065651 + 10201065652.

It is an arithmetic number, because the mean of its divisors is an integer number (10201065652).

Almost surely, 2^20402131303 is an apocalyptic number.

20402131303 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402131303 is an equidigital number, since it uses as much as digits as its factorization.

20402131303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20402131303 its reverse (30313120402), we get a palindrome (50715251705).

The spelling of 20402131303 in words is "twenty billion, four hundred two million, one hundred thirty-one thousand, three hundred three".