20701686 has 8 divisors (see below), whose sum is σ = 41403384. Its totient is φ = 6900560.

The previous prime is 20701663. The next prime is 20701691. The reversal of 20701686 is 68610702.

It is a happy number.

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

20701686 is an admirable number.

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, 1725135 + ... + 1725146.

It is an arithmetic number, because the mean of its divisors is an integer number (5175423).

Almost surely, 2^20701686 is an apocalyptic number.

20701686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20701686 is a wasteful number, since it uses less digits than its factorization.

20701686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450286.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20701686 is about 4549.9105485713. The cubic root of 20701686 is about 274.5797923980.

The spelling of 20701686 in words is "twenty million, seven hundred one thousand, six hundred eighty-six".