20255965 has 8 divisors (see below), whose sum is σ = 24706008. Its totient is φ = 15938880.

The previous prime is 20255953. The next prime is 20255981. The reversal of 20255965 is 56955202.

It can be written as a sum of positive squares in 4 ways, for example, as 131769 + 20124196 = 363^2 + 4486^2 .

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

It is not a de Polignac number, because 20255965 - 2⁵ = 20255933 is a prime.

It is a super-3 number, since 3×20255965³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20255965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32902 + ... + 33511.

It is an arithmetic number, because the mean of its divisors is an integer number (3088251).

Almost surely, 2^20255965 is an apocalyptic number.

It is an amenable number.

20255965 is a deficient number, since it is larger than the sum of its proper divisors (4450043).

20255965 is an equidigital number, since it uses as much as digits as its factorization.

20255965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66479.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 20255965 is about 4500.6627289767. The cubic root of 20255965 is about 272.5948495674.

The spelling of 20255965 in words is "twenty million, two hundred fifty-five thousand, nine hundred sixty-five".