20861035 has 8 divisors (see below), whose sum is σ = 26958960. Its totient is φ = 15405024.

The previous prime is 20861033. The next prime is 20861051. The reversal of 20861035 is 53016802.

It is a happy number.

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 20861035 - 2¹ = 20861033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20861033) by changing a digit.

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, 160405 + ... + 160534.

It is an arithmetic number, because the mean of its divisors is an integer number (3369870).

Almost surely, 2^20861035 is an apocalyptic number.

20861035 is a deficient number, since it is larger than the sum of its proper divisors (6097925).

20861035 is a wasteful number, since it uses less digits than its factorization.

20861035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320957.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20861035 is about 4567.3882033390. The cubic root of 20861035 is about 275.2825085765.

Adding to 20861035 its reverse (53016802), we get a palindrome (73877837).

The spelling of 20861035 in words is "twenty million, eight hundred sixty-one thousand, thirty-five".