20489168 has 40 divisors (see below), whose sum is σ = 46128000. Its totient is φ = 8634240.

The previous prime is 20489153. The next prime is 20489173. The reversal of 20489168 is 86198402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5333 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (1153200).

Almost surely, 2^20489168 is an apocalyptic number.

20489168 is a gapful number since it is divisible by the number (28) 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 20489168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23064000).

20489168 is an abundant number, since it is smaller than the sum of its proper divisors (25638832).

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

20489168 is a wasteful number, since it uses less digits than its factorization.

20489168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 20489168 is about 4526.4962167222. The cubic root of 20489168 is about 273.6369710536.

The spelling of 20489168 in words is "twenty million, four hundred eighty-nine thousand, one hundred sixty-eight".