20208408 has 64 divisors (see below), whose sum is σ = 56488320. Its totient is φ = 5971200.

The previous prime is 20208403. The next prime is 20208413. The reversal of 20208408 is 80480202.

It is an interprime number because it is at equal distance from previous prime (20208403) and next prime (20208413).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20208403) 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 15 ways as a sum of consecutive naturals, for example, 9891 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (882630).

Almost surely, 2^20208408 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 20208408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28244160).

20208408 is an abundant number, since it is smaller than the sum of its proper divisors (36279912).

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

20208408 is a wasteful number, since it uses less digits than its factorization.

20208408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928 (or 1924 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 20208408 is about 4495.3762912575. The cubic root of 20208408 is about 272.3813494619.

The spelling of 20208408 in words is "twenty million, two hundred eight thousand, four hundred eight".