20889600 has 180 divisors, whose sum is σ = 73135944. Its totient is φ = 5242880.

The previous prime is 20889593. The next prime is 20889613. The reversal of 20889600 is 698802.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1228792 + ... + 1228808.

Almost surely, 2^20889600 is an apocalyptic number.

20889600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20889600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36567972).

20889600 is an abundant number, since it is smaller than the sum of its proper divisors (52246344).

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

20889600 is an equidigital number, since it uses as much as digits as its factorization.

20889600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20889600 is about 4570.5141942674. The cubic root of 20889600 is about 275.4080993162.

The spelling of 20889600 in words is "twenty million, eight hundred eighty-nine thousand, six hundred".