206840909404 has 24 divisors (see below), whose sum is σ = 368830234080. Its totient is φ = 101461149504.

The previous prime is 206840909323. The next prime is 206840909419. The reversal of 206840909404 is 404909048602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3383542 + ... + 3444130.

It is an arithmetic number, because the mean of its divisors is an integer number (15367926420).

Almost surely, 2^206840909404 is an apocalyptic number.

It is an amenable number.

206840909404 is a deficient number, since it is larger than the sum of its proper divisors (161989324676).

206840909404 is a wasteful number, since it uses less digits than its factorization.

206840909404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76749 (or 76747 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 206840909404 in words is "two hundred six billion, eight hundred forty million, nine hundred nine thousand, four hundred four".