20208866800 has 30 divisors (see below), whose sum is σ = 48551803448. Its totient is φ = 8083546560.

The previous prime is 20208866789. The next prime is 20208866819. The reversal of 20208866800 is 866880202.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25260684 + ... + 25261483.

Almost surely, 2^20208866800 is an apocalyptic number.

20208866800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20208866800 is an abundant number, since it is smaller than the sum of its proper divisors (28342936648).

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

20208866800 is a wasteful number, since it uses less digits than its factorization.

20208866800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50522185 (or 50522174 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The spelling of 20208866800 in words is "twenty billion, two hundred eight million, eight hundred sixty-six thousand, eight hundred".