20203242431213 has 2 divisors, whose sum is σ = 20203242431214. Its totient is φ = 20203242431212.

The previous prime is 20203242431189. The next prime is 20203242431243. The reversal of 20203242431213 is 31213424230202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17509764074089 + 2693478357124 = 4184467^2 + 1641182^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203242431213 - 2⁸ = 20203242430957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203242431243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101621215606 + 10101621215607.

It is an arithmetic number, because the mean of its divisors is an integer number (10101621215607).

Almost surely, 2^{20203242431213} is an apocalyptic number.

It is an amenable number.

20203242431213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203242431213 is an equidigital number, since it uses as much as digits as its factorization.

20203242431213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20203242431213 its reverse (31213424230202), we get a palindrome (51416666661415).

The spelling of 20203242431213 in words is "twenty trillion, two hundred three billion, two hundred forty-two million, four hundred thirty-one thousand, two hundred thirteen".