203021999993 has 2 divisors, whose sum is σ = 203021999994. Its totient is φ = 203021999992.

The previous prime is 203021999981. The next prime is 203022000001. The reversal of 203021999993 is 399999120302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142549288249 + 60472711744 = 377557^2 + 245912^2 .

It is a cyclic number.

It is not a de Polignac number, because 203021999993 - 2³² = 198727032697 is a prime.

It is not a weakly prime, because it can be changed into another prime (203021999693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510999996 + 101510999997.

It is an arithmetic number, because the mean of its divisors is an integer number (101510999997).

Almost surely, 2^203021999993 is an apocalyptic number.

It is an amenable number.

203021999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

203021999993 is an equidigital number, since it uses as much as digits as its factorization.

203021999993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2125764, while the sum is 56.

The spelling of 203021999993 in words is "two hundred three billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-three".