20218346879 has 8 divisors (see below), whose sum is σ = 20889967392. Its totient is φ = 19557472480.

The previous prime is 20218346873. The next prime is 20218346923. The reversal of 20218346879 is 97864381202.

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 20218346879 - 2³² = 15923379583 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 (20218346873) 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 7 ways as a sum of consecutive naturals, for example, 2682704 + ... + 2690229.

It is an arithmetic number, because the mean of its divisors is an integer number (2611245924).

Almost surely, 2^20218346879 is an apocalyptic number.

20218346879 is a deficient number, since it is larger than the sum of its proper divisors (671620513).

20218346879 is an equidigital number, since it uses as much as digits as its factorization.

20218346879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373057.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 20218346879 in words is "twenty billion, two hundred eighteen million, three hundred forty-six thousand, eight hundred seventy-nine".