20732543 has 8 divisors (see below), whose sum is σ = 22931328. Its totient is φ = 18620064.

The previous prime is 20732513. The next prime is 20732567. The reversal of 20732543 is 34523702.

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 20732543 - 2¹² = 20728447 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20732513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21071 + ... + 22032.

It is an arithmetic number, because the mean of its divisors is an integer number (2866416).

Almost surely, 2^20732543 is an apocalyptic number.

20732543 is a deficient number, since it is larger than the sum of its proper divisors (2198785).

20732543 is a wasteful number, since it uses less digits than its factorization.

20732543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43153.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 20732543 is about 4553.3002317001. The cubic root of 20732543 is about 274.7161500914.

The spelling of 20732543 in words is "twenty million, seven hundred thirty-two thousand, five hundred forty-three".