20430542 has 8 divisors (see below), whose sum is σ = 33431832. Its totient is φ = 9286600.

The previous prime is 20430541. The next prime is 20430551. The reversal of 20430542 is 24503402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430541) 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 3 ways as a sum of consecutive naturals, for example, 464309 + ... + 464352.

It is an arithmetic number, because the mean of its divisors is an integer number (4178979).

Almost surely, 2^20430542 is an apocalyptic number.

20430542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20430542 is a deficient number, since it is larger than the sum of its proper divisors (13001290).

20430542 is a wasteful number, since it uses less digits than its factorization.

20430542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928674.

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

The square root of 20430542 is about 4520.0157079373. The cubic root of 20430542 is about 273.3757343832.

Adding to 20430542 its reverse (24503402), we get a palindrome (44933944).

The spelling of 20430542 in words is "twenty million, four hundred thirty thousand, five hundred forty-two".