20685701 has 8 divisors (see below), whose sum is σ = 21333504. Its totient is φ = 20042640.

The previous prime is 20685697. The next prime is 20685713. The reversal of 20685701 is 10758602.

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

It is a cyclic number.

It is not a de Polignac number, because 20685701 - 2² = 20685697 is a prime.

It is a super-2 number, since 2×20685701² = 855796451722802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20685001) 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 7 ways as a sum of consecutive naturals, for example, 8996 + ... + 11058.

It is an arithmetic number, because the mean of its divisors is an integer number (2666688).

Almost surely, 2^20685701 is an apocalyptic number.

It is an amenable number.

20685701 is a deficient number, since it is larger than the sum of its proper divisors (647803).

20685701 is a wasteful number, since it uses less digits than its factorization.

20685701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20685701 is about 4548.1535813998. The cubic root of 20685701 is about 274.5091010837.

The spelling of 20685701 in words is "twenty million, six hundred eighty-five thousand, seven hundred one".