208668911020 has 48 divisors (see below), whose sum is σ = 446447425536. Its totient is φ = 81904032000.

The previous prime is 208668910999. The next prime is 208668911057. The reversal of 208668911020 is 20119866802.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310485 + ... + 716755.

It is an arithmetic number, because the mean of its divisors is an integer number (9300988032).

Almost surely, 2^208668911020 is an apocalyptic number.

208668911020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208668911020 is an abundant number, since it is smaller than the sum of its proper divisors (237778514516).

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

208668911020 is a wasteful number, since it uses less digits than its factorization.

208668911020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406762 (or 406760 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 208668911020 in words is "two hundred eight billion, six hundred sixty-eight million, nine hundred eleven thousand, twenty".