20200385 has 8 divisors (see below), whose sum is σ = 25076520. Its totient is φ = 15602944.

The previous prime is 20200343. The next prime is 20200387. The reversal of 20200385 is 58300202.

It can be written as a sum of positive squares in 4 ways, for example, as 5400976 + 14799409 = 2324^2 + 3847^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20200385 - 2¹⁸ = 19938241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20200387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69512 + ... + 69801.

It is an arithmetic number, because the mean of its divisors is an integer number (3134565).

Almost surely, 2^20200385 is an apocalyptic number.

It is an amenable number.

20200385 is a deficient number, since it is larger than the sum of its proper divisors (4876135).

20200385 is a wasteful number, since it uses less digits than its factorization.

20200385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139347.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20200385 is about 4494.4838413326. The cubic root of 20200385 is about 272.3452983814.

Adding to 20200385 its reverse (58300202), we get a palindrome (78500587).

The spelling of 20200385 in words is "twenty million, two hundred thousand, three hundred eighty-five".