20008408 has 16 divisors (see below), whose sum is σ = 42875280. Its totient is φ = 8575008.

The previous prime is 20008381. The next prime is 20008447. The reversal of 20008408 is 80480002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178591 + ... + 178702.

It is an arithmetic number, because the mean of its divisors is an integer number (2679705).

Almost surely, 2^20008408 is an apocalyptic number.

20008408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20008408 is an abundant number, since it is smaller than the sum of its proper divisors (22866872).

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

20008408 is a wasteful number, since it uses less digits than its factorization.

20008408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357306 (or 357302 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 20008408 is about 4473.0758991996. The cubic root of 20008408 is about 271.4797943692.

The spelling of 20008408 in words is "twenty million, eight thousand, four hundred eight".