20886673 has 4 divisors (see below), whose sum is σ = 20899620. Its totient is φ = 20873728.

The previous prime is 20886661. The next prime is 20886683. The reversal of 20886673 is 37668802.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6801664 + 14085009 = 2608^2 + 3753^2 .

It is a cyclic number.

It is not a de Polignac number, because 20886673 - 2⁹ = 20886161 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20886683) 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, 3640 + ... + 7417.

It is an arithmetic number, because the mean of its divisors is an integer number (5224905).

Almost surely, 2^20886673 is an apocalyptic number.

It is an amenable number.

20886673 is a deficient number, since it is larger than the sum of its proper divisors (12947).

20886673 is a wasteful number, since it uses less digits than its factorization.

20886673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12946.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20886673 is about 4570.1939783777. The cubic root of 20886673 is about 275.3952355441.

The spelling of 20886673 in words is "twenty million, eight hundred eighty-six thousand, six hundred seventy-three".