20068865 has 8 divisors (see below), whose sum is σ = 24222888. Its totient is φ = 15961600.

The previous prime is 20068849. The next prime is 20068871. The reversal of 20068865 is 56886002.

It can be written as a sum of positive squares in 4 ways, for example, as 10784656 + 9284209 = 3284^2 + 3047^2 .

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

It is not a de Polignac number, because 20068865 - 2⁴ = 20068849 is a prime.

It is a Duffinian 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, 10736 + ... + 12465.

It is an arithmetic number, because the mean of its divisors is an integer number (3027861).

Almost surely, 2^20068865 is an apocalyptic number.

It is an amenable number.

20068865 is a deficient number, since it is larger than the sum of its proper divisors (4154023).

20068865 is a wasteful number, since it uses less digits than its factorization.

20068865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23379.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 20068865 is about 4479.8286797600. The cubic root of 20068865 is about 271.7529520455.

The spelling of 20068865 in words is "twenty million, sixty-eight thousand, eight hundred sixty-five".