20489088 has 64 divisors (see below), whose sum is σ = 54896400. Its totient is φ = 6770688.

The previous prime is 20489081. The next prime is 20489093. The reversal of 20489088 is 88098402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87820 + ... + 88052.

Almost surely, 2^20489088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20489088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27448200).

20489088 is an abundant number, since it is smaller than the sum of its proper divisors (34407312).

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

20489088 is a wasteful number, since it uses less digits than its factorization.

20489088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 20489088 is about 4526.4873798565. The cubic root of 20489088 is about 273.6366149144.

The spelling of 20489088 in words is "twenty million, four hundred eighty-nine thousand, eighty-eight".