203021231993 has 2 divisors, whose sum is σ = 203021231994. Its totient is φ = 203021231992.

The previous prime is 203021231939. The next prime is 203021232041. The reversal of 203021231993 is 399132120302.

It is a happy number.

Together with previous prime (203021231939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183769114489 + 19252117504 = 428683^2 + 138752^2 .

It is a cyclic number.

It is not a de Polignac number, because 203021231993 - 2⁶ = 203021231929 is a prime.

It is not a weakly prime, because it can be changed into another prime (203020231993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510615996 + 101510615997.

It is an arithmetic number, because the mean of its divisors is an integer number (101510615997).

Almost surely, 2^203021231993 is an apocalyptic number.

It is an amenable number.

203021231993 is a deficient number, since it is larger than the sum of its proper divisors (1).

203021231993 is an equidigital number, since it uses as much as digits as its factorization.

203021231993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 203021231993 in words is "two hundred three billion, twenty-one million, two hundred thirty-one thousand, nine hundred ninety-three".