20243135 has 32 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 13984000.

The previous prime is 20243117. The next prime is 20243137. The reversal of 20243135 is 53134202.

It is a happy number.

It is not a de Polignac number, because 20243135 - 2⁶ = 20243071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105890 + ... + 106080.

It is an arithmetic number, because the mean of its divisors is an integer number (870912).

Almost surely, 2^20243135 is an apocalyptic number.

20243135 is a deficient number, since it is larger than the sum of its proper divisors (7626049).

20243135 is a wasteful number, since it uses less digits than its factorization.

20243135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20243135 is about 4499.2371575635. The cubic root of 20243135 is about 272.5372841278.

Adding to 20243135 its reverse (53134202), we get a palindrome (73377337).

The spelling of 20243135 in words is "twenty million, two hundred forty-three thousand, one hundred thirty-five".