20980008 has 48 divisors (see below), whose sum is σ = 64939680. Its totient is φ = 5994144.

The previous prime is 20979983. The next prime is 20980027. The reversal of 20980008 is 80008902.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20310 + ... + 21317.

It is an arithmetic number, because the mean of its divisors is an integer number (1352910).

Almost surely, 2^20980008 is an apocalyptic number.

20980008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20980008 is an abundant number, since it is smaller than the sum of its proper divisors (43959672).

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

20980008 is a wasteful number, since it uses less digits than its factorization.

20980008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41646 (or 41639 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 20980008 is about 4580.3938695269. The cubic root of 20980008 is about 275.8048399804.

The spelling of 20980008 in words is "twenty million, nine hundred eighty thousand, eight".