20312135 has 8 divisors (see below), whose sum is σ = 24454320. Its totient is φ = 16196544.

The previous prime is 20312113. The next prime is 20312137. The reversal of 20312135 is 53121302.

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 20312135 - 2¹⁰ = 20311111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312137) 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, 4925 + ... + 8054.

It is an arithmetic number, because the mean of its divisors is an integer number (3056790).

Almost surely, 2^20312135 is an apocalyptic number.

20312135 is a deficient number, since it is larger than the sum of its proper divisors (4142185).

20312135 is a wasteful number, since it uses less digits than its factorization.

20312135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13297.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20312135 is about 4506.8986010338. The cubic root of 20312135 is about 272.8465864646.

Adding to 20312135 its reverse (53121302), we get a palindrome (73433437).

The spelling of 20312135 in words is "twenty million, three hundred twelve thousand, one hundred thirty-five".