20380008 has 128 divisors (see below), whose sum is σ = 62208000. Its totient is φ = 5483520.

The previous prime is 20379977. The next prime is 20380033. The reversal of 20380008 is 80008302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85153 + ... + 85391.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

Almost surely, 2^20380008 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 20380008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31104000).

20380008 is an abundant number, since it is smaller than the sum of its proper divisors (41827992).

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

20380008 is a wasteful number, since it uses less digits than its factorization.

20380008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20380008 is about 4514.4222221675. The cubic root of 20380008 is about 273.1501542183.

The spelling of 20380008 in words is "twenty million, three hundred eighty thousand, eight".