20660827 has 4 divisors (see below), whose sum is σ = 22539096. Its totient is φ = 18782560.

The previous prime is 20660813. The next prime is 20660839. The reversal of 20660827 is 72806602.

It is a happy number.

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 20660827 - 2¹¹ = 20658779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20660897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939118 + ... + 939139.

It is an arithmetic number, because the mean of its divisors is an integer number (5634774).

Almost surely, 2^20660827 is an apocalyptic number.

20660827 is a deficient number, since it is larger than the sum of its proper divisors (1878269).

20660827 is a wasteful number, since it uses less digits than its factorization.

20660827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878268.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20660827 is about 4545.4182425823. The cubic root of 20660827 is about 274.3990270105.

The spelling of 20660827 in words is "twenty million, six hundred sixty thousand, eight hundred twenty-seven".