20680267 has 8 divisors (see below), whose sum is σ = 21106800. Its totient is φ = 20256384.

The previous prime is 20680259. The next prime is 20680271. The reversal of 20680267 is 76208602.

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 20680267 - 2³ = 20680259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20680207) 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, 23703 + ... + 24559.

It is an arithmetic number, because the mean of its divisors is an integer number (2638350).

Almost surely, 2^20680267 is an apocalyptic number.

20680267 is a deficient number, since it is larger than the sum of its proper divisors (426533).

20680267 is an equidigital number, since it uses as much as digits as its factorization.

20680267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20680267 is about 4547.5561568825. The cubic root of 20680267 is about 274.4850617228.

Adding to 20680267 its reverse (76208602), we get a palindrome (96888869).

The spelling of 20680267 in words is "twenty million, six hundred eighty thousand, two hundred sixty-seven".