205355124003 has 4 divisors (see below), whose sum is σ = 273806832008. Its totient is φ = 136903416000.

The previous prime is 205355123989. The next prime is 205355124011. The reversal of 205355124003 is 300421553502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 205355124003 - 2¹⁰ = 205355122979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205355124503) 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, 34225853998 + ... + 34225854003.

It is an arithmetic number, because the mean of its divisors is an integer number (68451708002).

Almost surely, 2^205355124003 is an apocalyptic number.

205355124003 is a deficient number, since it is larger than the sum of its proper divisors (68451708005).

205355124003 is an equidigital number, since it uses as much as digits as its factorization.

205355124003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68451708004.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 205355124003 its reverse (300421553502), we get a palindrome (505776677505).

The spelling of 205355124003 in words is "two hundred five billion, three hundred fifty-five million, one hundred twenty-four thousand, three".