20488650 has 192 divisors, whose sum is σ = 66662400. Its totient is φ = 4043520.

The previous prime is 20488649. The next prime is 20488651. The reversal of 20488650 is 5688402.

It is an interprime number because it is at equal distance from previous prime (20488649) and next prime (20488651).

It is not an unprimeable number, because it can be changed into a prime (20488651) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 259311 + ... + 259389.

It is an arithmetic number, because the mean of its divisors is an integer number (347200).

Almost surely, 2^20488650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20488650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33331200).

20488650 is an abundant number, since it is smaller than the sum of its proper divisors (46173750).

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

20488650 is a wasteful number, since it uses less digits than its factorization.

20488650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 20488650 is about 4526.4389977111. The cubic root of 20488650 is about 273.6346650360.

The spelling of 20488650 in words is "twenty million, four hundred eighty-eight thousand, six hundred fifty".