20680693 has 8 divisors (see below), whose sum is σ = 22629600. Its totient is φ = 18743280.

The previous prime is 20680651. The next prime is 20680697. The reversal of 20680693 is 39608602.

It is a happy number.

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 20680693 - 2⁹ = 20680181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146 + ... + 6532.

It is an arithmetic number, because the mean of its divisors is an integer number (2828700).

Almost surely, 2^20680693 is an apocalyptic number.

It is an amenable number.

20680693 is a deficient number, since it is larger than the sum of its proper divisors (1948907).

20680693 is a wasteful number, since it uses less digits than its factorization.

20680693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20680693 is about 4547.6029949854. The cubic root of 20680693 is about 274.4869464476.

The spelling of 20680693 in words is "twenty million, six hundred eighty thousand, six hundred ninety-three".