20680239 has 8 divisors (see below), whose sum is σ = 27649072. Its totient is φ = 13749120.

The previous prime is 20680217. The next prime is 20680249. The reversal of 20680239 is 93208602.

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

It is not a de Polignac number, because 20680239 - 2⁵ = 20680207 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 (20680249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8122 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (3456134).

Almost surely, 2^20680239 is an apocalyptic number.

20680239 is a deficient number, since it is larger than the sum of its proper divisors (6968833).

20680239 is a wasteful number, since it uses less digits than its factorization.

20680239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18857.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20680239 is about 4547.5530783049. The cubic root of 20680239 is about 274.4849378433.

The spelling of 20680239 in words is "twenty million, six hundred eighty thousand, two hundred thirty-nine".