20441385 has 12 divisors (see below), whose sum is σ = 35431812. Its totient is φ = 10902048.

The previous prime is 20441363. The next prime is 20441401. The reversal of 20441385 is 58314402.

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 9865881 = 3252^2 + 3141^2 .

It is not a de Polignac number, because 20441385 - 2⁷ = 20441257 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227082 + ... + 227171.

It is an arithmetic number, because the mean of its divisors is an integer number (2952651).

Almost surely, 2^20441385 is an apocalyptic number.

It is an amenable number.

20441385 is a deficient number, since it is larger than the sum of its proper divisors (14990427).

20441385 is a wasteful number, since it uses less digits than its factorization.

20441385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454264 (or 454261 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20441385 is about 4521.2149915703. The cubic root of 20441385 is about 273.4240882782.

Adding to 20441385 its reverse (58314402), we get a palindrome (78755787).

The spelling of 20441385 in words is "twenty million, four hundred forty-one thousand, three hundred eighty-five".