20335385 has 32 divisors (see below), whose sum is σ = 29417472. Its totient is φ = 13201920.

The previous prime is 20335379. The next prime is 20335397. The reversal of 20335385 is 58353302.

It is not a de Polignac number, because 20335385 - 2¹⁶ = 20269849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52904 + ... + 53286.

It is an arithmetic number, because the mean of its divisors is an integer number (919296).

Almost surely, 2^20335385 is an apocalyptic number.

It is an amenable number.

20335385 is a deficient number, since it is larger than the sum of its proper divisors (9082087).

20335385 is a wasteful number, since it uses less digits than its factorization.

20335385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 20335385 is about 4509.4772424307. The cubic root of 20335385 is about 272.9506501072.

Adding to 20335385 its reverse (58353302), we get a palindrome (78688687).

The spelling of 20335385 in words is "twenty million, three hundred thirty-five thousand, three hundred eighty-five".