20430135 has 48 divisors (see below), whose sum is σ = 39031200. Its totient is φ = 9803520.

The previous prime is 20430131. The next prime is 20430143. The reversal of 20430135 is 53103402.

It is not a de Polignac number, because 20430135 - 2² = 20430131 is a prime.

It is a super-2 number, since 2×20430135² = 834780832236450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73617 + ... + 73893.

It is an arithmetic number, because the mean of its divisors is an integer number (813150).

Almost surely, 2^20430135 is an apocalyptic number.

20430135 is a deficient number, since it is larger than the sum of its proper divisors (18601065).

20430135 is a wasteful number, since it uses less digits than its factorization.

20430135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20430135 is about 4519.9706857456. The cubic root of 20430135 is about 273.3739190510.

Adding to 20430135 its reverse (53103402), we get a palindrome (73533537).

The spelling of 20430135 in words is "twenty million, four hundred thirty thousand, one hundred thirty-five".