20202323431 has 2 divisors, whose sum is σ = 20202323432. Its totient is φ = 20202323430.

The previous prime is 20202323423. The next prime is 20202323441. The reversal of 20202323431 is 13432320202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202323431 - 2³ = 20202323423 is a prime.

It is a super-2 number, since 2×20202323431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202323441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101161715 + 10101161716.

It is an arithmetic number, because the mean of its divisors is an integer number (10101161716).

Almost surely, 2^20202323431 is an apocalyptic number.

20202323431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202323431 is an equidigital number, since it uses as much as digits as its factorization.

20202323431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20202323431 its reverse (13432320202), we get a palindrome (33634643633).

The spelling of 20202323431 in words is "twenty billion, two hundred two million, three hundred twenty-three thousand, four hundred thirty-one".