20201716867 has 4 divisors (see below), whose sum is σ = 20671524280. Its totient is φ = 19731909456.

The previous prime is 20201716859. The next prime is 20201716889. The reversal of 20201716867 is 76861710202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76861710202 = 2 ⋅38430855101.

It is a cyclic number.

It is not a de Polignac number, because 20201716867 - 2³ = 20201716859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201716967) 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 3 ways as a sum of consecutive naturals, for example, 234903642 + ... + 234903727.

It is an arithmetic number, because the mean of its divisors is an integer number (5167881070).

Almost surely, 2^20201716867 is an apocalyptic number.

20201716867 is a deficient number, since it is larger than the sum of its proper divisors (469807413).

20201716867 is an equidigital number, since it uses as much as digits as its factorization.

20201716867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469807412.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 20201716867 in words is "twenty billion, two hundred one million, seven hundred sixteen thousand, eight hundred sixty-seven".