20889904160 has 48 divisors (see below), whose sum is σ = 51949900800. Its totient is φ = 7916173056.

The previous prime is 20889904159. The next prime is 20889904237. The reversal of 20889904160 is 6140998802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3432800 + ... + 3438879.

It is an arithmetic number, because the mean of its divisors is an integer number (1082289600).

Almost surely, 2^20889904160 is an apocalyptic number.

20889904160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20889904160 is an abundant number, since it is smaller than the sum of its proper divisors (31059996640).

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

20889904160 is a wasteful number, since it uses less digits than its factorization.

20889904160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6871713 (or 6871705 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 20889904160 in words is "twenty billion, eight hundred eighty-nine million, nine hundred four thousand, one hundred sixty".