20918068679 has 8 divisors (see below), whose sum is σ = 21595993728. Its totient is φ = 20240340480.

The previous prime is 20918068643. The next prime is 20918068687. The reversal of 20918068679 is 97686081902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20918068679 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 (20918068579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184439 + ... + 275415.

It is an arithmetic number, because the mean of its divisors is an integer number (2699499216).

Almost surely, 2^20918068679 is an apocalyptic number.

20918068679 is a deficient number, since it is larger than the sum of its proper divisors (677925049).

20918068679 is an equidigital number, since it uses as much as digits as its factorization.

20918068679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98425.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 20918068679 in words is "twenty billion, nine hundred eighteen million, sixty-eight thousand, six hundred seventy-nine".