20746243 has 8 divisors (see below), whose sum is σ = 23853312. Its totient is φ = 17675016.

The previous prime is 20746241. The next prime is 20746247. The reversal of 20746243 is 34264702.

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 20746243 - 2¹ = 20746241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20746241) 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, 7705 + ... + 10042.

It is an arithmetic number, because the mean of its divisors is an integer number (2981664).

Almost surely, 2^20746243 is an apocalyptic number.

20746243 is a deficient number, since it is larger than the sum of its proper divisors (3107069).

20746243 is a wasteful number, since it uses less digits than its factorization.

20746243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17921.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20746243 is about 4554.8043865791. The cubic root of 20746243 is about 274.7766472940.

The spelling of 20746243 in words is "twenty million, seven hundred forty-six thousand, two hundred forty-three".