20301808 has 40 divisors (see below), whose sum is σ = 42117840. Its totient is φ = 9446400.

The previous prime is 20301793. The next prime is 20301817. The reversal of 20301808 is 80810302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27103 + ... + 27841.

It is an arithmetic number, because the mean of its divisors is an integer number (1052946).

Almost surely, 2^20301808 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 20301808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21058920).

20301808 is an abundant number, since it is smaller than the sum of its proper divisors (21816032).

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

20301808 is a wasteful number, since it uses less digits than its factorization.

20301808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20301808 is about 4505.7527672965. The cubic root of 20301808 is about 272.8003388340.

The spelling of 20301808 in words is "twenty million, three hundred one thousand, eight hundred eight".