20670686 has 8 divisors (see below), whose sum is σ = 31167264. Its totient is φ = 10281600.

The previous prime is 20670673. The next prime is 20670701. The reversal of 20670686 is 68607602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26390 + ... + 27161.

It is an arithmetic number, because the mean of its divisors is an integer number (3895908).

Almost surely, 2^20670686 is an apocalyptic number.

20670686 is a deficient number, since it is larger than the sum of its proper divisors (10496578).

20670686 is a wasteful number, since it uses less digits than its factorization.

20670686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53746.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20670686 is about 4546.5026118985. The cubic root of 20670686 is about 274.4426662739.

The spelling of 20670686 in words is "twenty million, six hundred seventy thousand, six hundred eighty-six".