20430524 has 24 divisors (see below), whose sum is σ = 36886080. Its totient is φ = 9896256.

The previous prime is 20430517. The next prime is 20430539. The reversal of 20430524 is 42503402.

It is a junction number, because it is equal to n+sod(n) for n = 20430496 and 20430505.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19994 + ... + 20990.

It is an arithmetic number, because the mean of its divisors is an integer number (1536920).

Almost surely, 2^20430524 is an apocalyptic number.

It is an amenable number.

20430524 is a deficient number, since it is larger than the sum of its proper divisors (16455556).

20430524 is a wasteful number, since it uses less digits than its factorization.

20430524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20430524 is about 4520.0137167933. The cubic root of 20430524 is about 273.3756540988.

Adding to 20430524 its reverse (42503402), we get a palindrome (62933926).

The spelling of 20430524 in words is "twenty million, four hundred thirty thousand, five hundred twenty-four".