20305060 has 24 divisors (see below), whose sum is σ = 42804216. Its totient is φ = 8090880.

The previous prime is 20305049. The next prime is 20305063. The reversal of 20305060 is 6050302.

It can be written as a sum of positive squares in 4 ways, for example, as 19044 + 20286016 = 138^2 + 4504^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3814 + ... + 7426.

It is an arithmetic number, because the mean of its divisors is an integer number (1783509).

Almost surely, 2^20305060 is an apocalyptic number.

20305060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20305060 is an abundant number, since it is smaller than the sum of its proper divisors (22499156).

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

20305060 is a wasteful number, since it uses less digits than its factorization.

20305060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3901 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20305060 is about 4506.1136248435. The cubic root of 20305060 is about 272.8149040283.

Adding to 20305060 its reverse (6050302), we get a palindrome (26355362).

The spelling of 20305060 in words is "twenty million, three hundred five thousand, sixty".