20448620 has 48 divisors (see below), whose sum is σ = 45904320. Its totient is φ = 7624704.

The previous prime is 20448599. The next prime is 20448661. The reversal of 20448620 is 2684402.

It is a self number, because there is not a number n which added to its sum of digits gives 20448620.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46361 + ... + 46799.

It is an arithmetic number, because the mean of its divisors is an integer number (956340).

Almost surely, 2^20448620 is an apocalyptic number.

20448620 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 20448620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22952160).

20448620 is an abundant number, since it is smaller than the sum of its proper divisors (25455700).

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

20448620 is a wasteful number, since it uses less digits than its factorization.

20448620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 20448620 is about 4522.0150375690. The cubic root of 20448620 is about 273.4563429409.

The spelling of 20448620 in words is "twenty million, four hundred forty-eight thousand, six hundred twenty".