203775130493 has 4 divisors (see below), whose sum is σ = 222300142368. Its totient is φ = 185250118620.

The previous prime is 203775130469. The next prime is 203775130501. The reversal of 203775130493 is 394031577302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203775130493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203775130193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9262505921 + ... + 9262505942.

It is an arithmetic number, because the mean of its divisors is an integer number (55575035592).

Almost surely, 2^203775130493 is an apocalyptic number.

It is an amenable number.

203775130493 is a deficient number, since it is larger than the sum of its proper divisors (18525011875).

203775130493 is a wasteful number, since it uses less digits than its factorization.

203775130493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18525011874.

The product of its (nonzero) digits is 476280, while the sum is 44.

The spelling of 203775130493 in words is "two hundred three billion, seven hundred seventy-five million, one hundred thirty thousand, four hundred ninety-three".