20043542 has 8 divisors (see below), whose sum is σ = 30084600. Its totient is φ = 10015344.

The previous prime is 20043469. The next prime is 20043559. The reversal of 20043542 is 24534002.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3434 + ... + 7202.

It is an arithmetic number, because the mean of its divisors is an integer number (3760575).

Almost surely, 2^20043542 is an apocalyptic number.

20043542 is a deficient number, since it is larger than the sum of its proper divisors (10041058).

20043542 is a wasteful number, since it uses less digits than its factorization.

20043542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430.

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

The square root of 20043542 is about 4477.0014518649. The cubic root of 20043542 is about 271.6386041664.

Adding to 20043542 its reverse (24534002), we get a palindrome (44577544).

The spelling of 20043542 in words is "twenty million, forty-three thousand, five hundred forty-two".