20203518373 has 2 divisors, whose sum is σ = 20203518374. Its totient is φ = 20203518372.

The previous prime is 20203518347. The next prime is 20203518427. The reversal of 20203518373 is 37381530202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16326961729 + 3876556644 = 127777^2 + 62262^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203518373 - 2⁹ = 20203517861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203518323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101759186 + 10101759187.

It is an arithmetic number, because the mean of its divisors is an integer number (10101759187).

Almost surely, 2^20203518373 is an apocalyptic number.

It is an amenable number.

20203518373 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203518373 is an equidigital number, since it uses as much as digits as its factorization.

20203518373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20203518373 in words is "twenty billion, two hundred three million, five hundred eighteen thousand, three hundred seventy-three".