20741686 has 16 divisors (see below), whose sum is σ = 36161280. Its totient is φ = 8738280.

The previous prime is 20741621. The next prime is 20741713. The reversal of 20741686 is 68614702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11730 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (2260080).

Almost surely, 2^20741686 is an apocalyptic number.

20741686 is a deficient number, since it is larger than the sum of its proper divisors (15419594).

20741686 is a wasteful number, since it uses less digits than its factorization.

20741686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25179.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20741686 is about 4554.3041180843. The cubic root of 20741686 is about 274.7565272033.

The spelling of 20741686 in words is "twenty million, seven hundred forty-one thousand, six hundred eighty-six".