20676717 has 12 divisors (see below), whose sum is σ = 29972124. Its totient is φ = 13735680.

The previous prime is 20676707. The next prime is 20676781. The reversal of 20676717 is 71767602.

It can be written as a sum of positive squares in 2 ways, for example, as 14356521 + 6320196 = 3789^2 + 2514^2 .

It is not a de Polignac number, because 20676717 - 2⁷ = 20676589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20676707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1284 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (2497677).

Almost surely, 2^20676717 is an apocalyptic number.

It is an amenable number.

20676717 is a deficient number, since it is larger than the sum of its proper divisors (9295407).

20676717 is a wasteful number, since it uses less digits than its factorization.

20676717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8140 (or 8137 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 20676717 is about 4547.1658205964. The cubic root of 20676717 is about 274.4693546766.

The spelling of 20676717 in words is "twenty million, six hundred seventy-six thousand, seven hundred seventeen".