20730743 has 8 divisors (see below), whose sum is σ = 22849680. Its totient is φ = 18650880.

The previous prime is 20730739. The next prime is 20730757. The reversal of 20730743 is 34703702.

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 20730743 - 2² = 20730739 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 (20730733) 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, 8648 + ... + 10781.

It is an arithmetic number, because the mean of its divisors is an integer number (2856210).

Almost surely, 2^20730743 is an apocalyptic number.

20730743 is a deficient number, since it is larger than the sum of its proper divisors (2118937).

20730743 is a wasteful number, since it uses less digits than its factorization.

20730743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19537.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 20730743 is about 4553.1025685789. The cubic root of 20730743 is about 274.7081995732.

The spelling of 20730743 in words is "twenty million, seven hundred thirty thousand, seven hundred forty-three".