206531020603 has 4 divisors (see below), whose sum is σ = 206534024968. Its totient is φ = 206528016240.

The previous prime is 206531020601. The next prime is 206531020637. The reversal of 206531020603 is 306020135602.

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 206531020603 - 2¹ = 206531020601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206531020601) 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, 1396593 + ... + 1537378.

It is an arithmetic number, because the mean of its divisors is an integer number (51633506242).

Almost surely, 2^206531020603 is an apocalyptic number.

206531020603 is a deficient number, since it is larger than the sum of its proper divisors (3004365).

206531020603 is an equidigital number, since it uses as much as digits as its factorization.

206531020603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004364.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 206531020603 in words is "two hundred six billion, five hundred thirty-one million, twenty thousand, six hundred three".