20800600867 has 4 divisors (see below), whose sum is σ = 21051210600. Its totient is φ = 20549991136.

The previous prime is 20800600861. The next prime is 20800600883. The reversal of 20800600867 is 76800600802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76800600802 = 2 ⋅38400300401.

It is a cyclic number.

It is not a de Polignac number, because 20800600867 - 2³ = 20800600859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20800600861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125304742 + ... + 125304907.

It is an arithmetic number, because the mean of its divisors is an integer number (5262802650).

Almost surely, 2^20800600867 is an apocalyptic number.

20800600867 is a deficient number, since it is larger than the sum of its proper divisors (250609733).

20800600867 is an equidigital number, since it uses as much as digits as its factorization.

20800600867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250609732.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 20800600867 in words is "twenty billion, eight hundred million, six hundred thousand, eight hundred sixty-seven".