20746743 has 8 divisors (see below), whose sum is σ = 28012800. Its totient is φ = 13655928.

The previous prime is 20746721. The next prime is 20746777. The reversal of 20746743 is 34764702.

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

It is not a de Polignac number, because 20746743 - 2⁵ = 20746711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746793) 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, 43533 + ... + 44006.

It is an arithmetic number, because the mean of its divisors is an integer number (3501600).

Almost surely, 2^20746743 is an apocalyptic number.

20746743 is a deficient number, since it is larger than the sum of its proper divisors (7266057).

20746743 is an equidigital number, since it uses as much as digits as its factorization.

20746743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87621.

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 20746743 is about 4554.8592733475. The cubic root of 20746743 is about 274.7788547173.

The spelling of 20746743 in words is "twenty million, seven hundred forty-six thousand, seven hundred forty-three".