206340645 has 32 divisors (see below), whose sum is σ = 399506688. Its totient is φ = 88777728.

The previous prime is 206340643. The next prime is 206340647. The reversal of 206340645 is 546043602.

It is an interprime number because it is at equal distance from previous prime (206340643) and next prime (206340647).

It is not a de Polignac number, because 206340645 - 2¹ = 206340643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206340643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56014 + ... + 59583.

It is an arithmetic number, because the mean of its divisors is an integer number (12484584).

Almost surely, 2^206340645 is an apocalyptic number.

It is an amenable number.

206340645 is a deficient number, since it is larger than the sum of its proper divisors (193166043).

206340645 is a wasteful number, since it uses less digits than its factorization.

206340645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115629.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 206340645 is about 14364.5621235038. The cubic root of 206340645 is about 590.9194177826.

The spelling of 206340645 in words is "two hundred six million, three hundred forty thousand, six hundred forty-five".