20682715 has 8 divisors (see below), whose sum is σ = 24860880. Its totient is φ = 16518432.

The previous prime is 20682677. The next prime is 20682719. The reversal of 20682715 is 51728602.

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 20682715 - 2⁷ = 20682587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20682719) 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, 157 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (3107610).

Almost surely, 2^20682715 is an apocalyptic number.

20682715 is a deficient number, since it is larger than the sum of its proper divisors (4178165).

20682715 is an equidigital number, since it uses as much as digits as its factorization.

20682715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6941.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 20682715 is about 4547.8253044725. The cubic root of 20682715 is about 274.4958919008.

The spelling of 20682715 in words is "twenty million, six hundred eighty-two thousand, seven hundred fifteen".