20730039 has 8 divisors (see below), whose sum is σ = 30152832. Its totient is φ = 12563640.

The previous prime is 20730037. The next prime is 20730053. The reversal of 20730039 is 93003702.

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

It is not a de Polignac number, because 20730039 - 2¹ = 20730037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730037) 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, 314059 + ... + 314124.

It is an arithmetic number, because the mean of its divisors is an integer number (3769104).

Almost surely, 2^20730039 is an apocalyptic number.

20730039 is a deficient number, since it is larger than the sum of its proper divisors (9422793).

20730039 is a wasteful number, since it uses less digits than its factorization.

20730039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628197.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 20730039 is about 4553.0252580015. The cubic root of 20730039 is about 274.7050899120.

The spelling of 20730039 in words is "twenty million, seven hundred thirty thousand, thirty-nine".