20546543 has 8 divisors (see below), whose sum is σ = 21840000. Its totient is φ = 19274328.

The previous prime is 20546497. The next prime is 20546579. The reversal of 20546543 is 34564502.

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 20546543 - 2⁶ = 20546479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20546593) 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, 3293 + ... + 7206.

It is an arithmetic number, because the mean of its divisors is an integer number (2730000).

Almost surely, 2^20546543 is an apocalyptic number.

20546543 is a deficient number, since it is larger than the sum of its proper divisors (1293457).

20546543 is a wasteful number, since it uses less digits than its factorization.

20546543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20546543 is about 4532.8294695477. The cubic root of 20546543 is about 273.8921512435.

The spelling of 20546543 in words is "twenty million, five hundred forty-six thousand, five hundred forty-three".