20431130201 has 2 divisors, whose sum is σ = 20431130202. Its totient is φ = 20431130200.

The previous prime is 20431130197. The next prime is 20431130231. The reversal of 20431130201 is 10203113402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15776616025 + 4654514176 = 125605^2 + 68224^2 .

It is a cyclic number.

It is not a de Polignac number, because 20431130201 - 2² = 20431130197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20431130201.

It is not a weakly prime, because it can be changed into another prime (20431130231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215565100 + 10215565101.

It is an arithmetic number, because the mean of its divisors is an integer number (10215565101).

Almost surely, 2^20431130201 is an apocalyptic number.

It is an amenable number.

20431130201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431130201 is an equidigital number, since it uses as much as digits as its factorization.

20431130201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20431130201 its reverse (10203113402), we get a palindrome (30634243603).

The spelling of 20431130201 in words is "twenty billion, four hundred thirty-one million, one hundred thirty thousand, two hundred one".