206105020503 has 8 divisors (see below), whose sum is σ = 274966194048. Its totient is φ = 137323596984.

The previous prime is 206105020403. The next prime is 206105020553. The reversal of 206105020503 is 305020501602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206105020503 - 2¹⁰ = 206105019479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206105020553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19931475 + ... + 19941812.

It is an arithmetic number, because the mean of its divisors is an integer number (34370774256).

Almost surely, 2^206105020503 is an apocalyptic number.

206105020503 is a deficient number, since it is larger than the sum of its proper divisors (68861173545).

206105020503 is a wasteful number, since it uses less digits than its factorization.

206105020503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39875013.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 206105020503 in words is "two hundred six billion, one hundred five million, twenty thousand, five hundred three".