20395866 has 8 divisors (see below), whose sum is σ = 40791744. Its totient is φ = 6798620.

The previous prime is 20395853. The next prime is 20395883. The reversal of 20395866 is 66859302.

It is a sphenic number, since it is the product of 3 distinct primes.

20395866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699650 + ... + 1699661.

It is an arithmetic number, because the mean of its divisors is an integer number (5098968).

Almost surely, 2^20395866 is an apocalyptic number.

20395866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20395866 is a wasteful number, since it uses less digits than its factorization.

20395866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399316.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 20395866 is about 4516.1782515751. The cubic root of 20395866 is about 273.2209833062.

It can be divided in two parts, 203 and 95866, that added together give a palindrome (96069).

The spelling of 20395866 in words is "twenty million, three hundred ninety-five thousand, eight hundred sixty-six".