205412003 has 4 divisors (see below), whose sum is σ = 217495080. Its totient is φ = 193328928.

The previous prime is 205411991. The next prime is 205412029. The reversal of 205412003 is 300214502.

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

It is a cyclic number.

It is not a de Polignac number, because 205412003 - 2⁶ = 205411939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 12083059 = 205412003 / (2 + 0 + 5 + 4 + 1 + 2 + 0 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205412303) 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, 6041513 + ... + 6041546.

It is an arithmetic number, because the mean of its divisors is an integer number (54373770).

Almost surely, 2^205412003 is an apocalyptic number.

205412003 is a deficient number, since it is larger than the sum of its proper divisors (12083077).

205412003 is a wasteful number, since it uses less digits than its factorization.

205412003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12083076.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 205412003 is about 14332.2016103598. The cubic root of 205412003 is about 590.0316012950.

Adding to 205412003 its reverse (300214502), we get a palindrome (505626505).

The spelling of 205412003 in words is "two hundred five million, four hundred twelve thousand, three".