20716877 has 8 divisors (see below), whose sum is σ = 21088512. Its totient is φ = 20347600.

The previous prime is 20716873. The next prime is 20716907. The reversal of 20716877 is 77861702.

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 20716877 - 2² = 20716873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20716877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20716873) 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 7 ways as a sum of consecutive naturals, for example, 30263 + ... + 30939.

It is an arithmetic number, because the mean of its divisors is an integer number (2636064).

Almost surely, 2^20716877 is an apocalyptic number.

It is an amenable number.

20716877 is a deficient number, since it is larger than the sum of its proper divisors (371635).

20716877 is an equidigital number, since it uses as much as digits as its factorization.

20716877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 20716877 is about 4551.5796159136. The cubic root of 20716877 is about 274.6469386484.

The spelling of 20716877 in words is "twenty million, seven hundred sixteen thousand, eight hundred seventy-seven".