20395260 has 96 divisors (see below), whose sum is σ = 64108800. Its totient is φ = 5382720.

The previous prime is 20395231. The next prime is 20395283. The reversal of 20395260 is 6259302.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 96555 + ... + 96765.

It is an arithmetic number, because the mean of its divisors is an integer number (667800).

Almost surely, 2^20395260 is an apocalyptic number.

20395260 is a gapful number since it is divisible by the number (20) 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 20395260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32054400).

20395260 is an abundant number, since it is smaller than the sum of its proper divisors (43713540).

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

20395260 is a wasteful number, since it uses less digits than its factorization.

20395260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20395260 is about 4516.1111589508. Note that the first 4 decimals coincide. The cubic root of 20395260 is about 273.2182773075.

The spelling of 20395260 in words is "twenty million, three hundred ninety-five thousand, two hundred sixty".