20706727 has 4 divisors (see below), whose sum is σ = 20725840. Its totient is φ = 20687616.

The previous prime is 20706709. The next prime is 20706767. The reversal of 20706727 is 72760702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20706727 - 2¹⁵ = 20673959 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 (20706767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7827 + ... + 10132.

It is an arithmetic number, because the mean of its divisors is an integer number (5181460).

Almost surely, 2^20706727 is an apocalyptic number.

20706727 is a deficient number, since it is larger than the sum of its proper divisors (19113).

20706727 is a wasteful number, since it uses less digits than its factorization.

20706727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19112.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 20706727 is about 4550.4644817864. The cubic root of 20706727 is about 274.6020779323.

The spelling of 20706727 in words is "twenty million, seven hundred six thousand, seven hundred twenty-seven".