203553453241993 has 2 divisors, whose sum is σ = 203553453241994. Its totient is φ = 203553453241992.

The previous prime is 203553453241969. The next prime is 203553453242021. The reversal of 203553453241993 is 399142354355302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128650105814409 + 74903347427584 = 11342403^2 + 8654672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203553453241993 is a prime.

It is a super-2 number, since 2×203553453241993² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203553453241393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101776726620996 + 101776726620997.

It is an arithmetic number, because the mean of its divisors is an integer number (101776726620997).

Almost surely, 2^{203553453241993} is an apocalyptic number.

It is an amenable number.

203553453241993 is a deficient number, since it is larger than the sum of its proper divisors (1).

203553453241993 is an equidigital number, since it uses as much as digits as its factorization.

203553453241993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488000, while the sum is 58.

The spelling of 203553453241993 in words is "two hundred three trillion, five hundred fifty-three billion, four hundred fifty-three million, two hundred forty-one thousand, nine hundred ninety-three".