20730543 has 8 divisors (see below), whose sum is σ = 28315056. Its totient is φ = 13483200.

The previous prime is 20730533. The next prime is 20730551. The reversal of 20730543 is 34503702.

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

It is not a de Polignac number, because 20730543 - 2²² = 16536239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730533) 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, 84148 + ... + 84393.

It is an arithmetic number, because the mean of its divisors is an integer number (3539382).

Almost surely, 2^20730543 is an apocalyptic number.

20730543 is a deficient number, since it is larger than the sum of its proper divisors (7584513).

20730543 is a wasteful number, since it uses less digits than its factorization.

20730543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168585.

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 20730543 is about 4553.0806054802. The cubic root of 20730543 is about 274.7073161539.

The spelling of 20730543 in words is "twenty million, seven hundred thirty thousand, five hundred forty-three".