20712727 has 4 divisors (see below), whose sum is σ = 23671696. Its totient is φ = 17753760.

The previous prime is 20712709. The next prime is 20712751. The reversal of 20712727 is 72721702.

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 20712727 - 2¹⁵ = 20679959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20712695 and 20712704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20712707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1479474 + ... + 1479487.

It is an arithmetic number, because the mean of its divisors is an integer number (5917924).

Almost surely, 2^20712727 is an apocalyptic number.

20712727 is a deficient number, since it is larger than the sum of its proper divisors (2958969).

20712727 is an equidigital number, since it uses as much as digits as its factorization.

20712727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958968.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 20712727 is about 4551.1237073936. The cubic root of 20712727 is about 274.6285983533.

The spelling of 20712727 in words is "twenty million, seven hundred twelve thousand, seven hundred twenty-seven".