206886870918 has 48 divisors (see below), whose sum is σ = 551698326816. Its totient is φ = 54563569920.

The previous prime is 206886870871. The next prime is 206886870923. The reversal of 206886870918 is 819078688602.

206886870918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63150643 + ... + 63153918.

It is an arithmetic number, because the mean of its divisors is an integer number (11493715142).

Almost surely, 2^206886870918 is an apocalyptic number.

206886870918 is an abundant number, since it is smaller than the sum of its proper divisors (344811455898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206886870918 is a wasteful number, since it uses less digits than its factorization.

206886870918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126304589 (or 126304586 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 206886870918 in words is "two hundred six billion, eight hundred eighty-six million, eight hundred seventy thousand, nine hundred eighteen".