20889191600 has 30 divisors (see below), whose sum is σ = 50186283780. Its totient is φ = 8355676480.

The previous prime is 20889191599. The next prime is 20889191611. The reversal of 20889191600 is 619198802.

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, 26111090 + ... + 26111889.

It is an arithmetic number, because the mean of its divisors is an integer number (1672876126).

Almost surely, 2^20889191600 is an apocalyptic number.

20889191600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20889191600 is an abundant number, since it is smaller than the sum of its proper divisors (29297092180).

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

20889191600 is a wasteful number, since it uses less digits than its factorization.

20889191600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52222997 (or 52222986 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 20889191600 in words is "twenty billion, eight hundred eighty-nine million, one hundred ninety-one thousand, six hundred".