63805020 has 96 divisors (see below), whose sum is σ = 188225856. Its totient is φ = 16128000.

The previous prime is 63804989. The next prime is 63805069. The reversal of 63805020 is 2050836.

It is a congruent number.

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, 90670 + ... + 91370.

It is an arithmetic number, because the mean of its divisors is an integer number (1960686).

Almost surely, 2^63805020 is an apocalyptic number.

63805020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63805020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94112928).

63805020 is an abundant number, since it is smaller than the sum of its proper divisors (124420836).

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

63805020 is a wasteful number, since it uses less digits than its factorization.

63805020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 63805020 is about 7987.8044542916. The cubic root of 63805020 is about 399.5933784540.

Adding to 63805020 its reverse (2050836), we get a palindrome (65855856).

The spelling of 63805020 in words is "sixty-three million, eight hundred five thousand, twenty".