20686341 has 16 divisors (see below), whose sum is σ = 29937600. Its totient is φ = 12629760.

The previous prime is 20686333. The next prime is 20686343. The reversal of 20686341 is 14368602.

It is not a de Polignac number, because 20686341 - 2³ = 20686333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20686299 and 20686308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3085 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^20686341 is an apocalyptic number.

It is an amenable number.

20686341 is a deficient number, since it is larger than the sum of its proper divisors (9251259).

20686341 is a wasteful number, since it uses less digits than its factorization.

20686341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20686341 is about 4548.2239390778. The cubic root of 20686341 is about 274.5119320894.

The spelling of 20686341 in words is "twenty million, six hundred eighty-six thousand, three hundred forty-one".