20730043 has 8 divisors (see below), whose sum is σ = 20991600. Its totient is φ = 20470368.

The previous prime is 20730037. The next prime is 20730053. The reversal of 20730043 is 34003702.

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 20730043 - 2⁵ = 20730011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20730043.

It is not an unprimeable number, because it can be changed into a prime (20730053) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40473 + ... + 40981.

It is an arithmetic number, because the mean of its divisors is an integer number (2623950).

Almost surely, 2^20730043 is an apocalyptic number.

20730043 is a deficient number, since it is larger than the sum of its proper divisors (261557).

20730043 is a wasteful number, since it uses less digits than its factorization.

20730043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 20730043 is about 4553.0256972699. The cubic root of 20730043 is about 274.7051075807.

Adding to 20730043 its reverse (34003702), we get a palindrome (54733745).

The spelling of 20730043 in words is "twenty million, seven hundred thirty thousand, forty-three".