20008008 has 24 divisors (see below), whose sum is σ = 54188550. Its totient is φ = 6669312.

The previous prime is 20007979. The next prime is 20008019. The reversal of 20008008 is 80080002.

It can be written as a sum of positive squares in only one way, i.e., 16016004 + 3992004 = 4002^2 + 1998^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138873 + ... + 139016.

Almost surely, 2^20008008 is an apocalyptic number.

It is an amenable number.

20008008 is an abundant number, since it is smaller than the sum of its proper divisors (34180542).

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

20008008 is a wasteful number, since it uses less digits than its factorization.

20008008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277901 (or 277894 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20008008 is about 4473.0311870140. The cubic root of 20008008 is about 271.4779852524.

The spelling of 20008008 in words is "twenty million, eight thousand, eight".