20403303131 has 2 divisors, whose sum is σ = 20403303132. Its totient is φ = 20403303130.

The previous prime is 20403303127. The next prime is 20403303143. The reversal of 20403303131 is 13130330402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20403303131 - 2² = 20403303127 is a prime.

It is a super-2 number, since 2×20403303131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20403303101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201651565 + 10201651566.

It is an arithmetic number, because the mean of its divisors is an integer number (10201651566).

Almost surely, 2^20403303131 is an apocalyptic number.

20403303131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20403303131 is an equidigital number, since it uses as much as digits as its factorization.

20403303131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20403303131 its reverse (13130330402), we get a palindrome (33533633533).

The spelling of 20403303131 in words is "twenty billion, four hundred three million, three hundred three thousand, one hundred thirty-one".