20718054063808 has 28 divisors (see below), whose sum is σ = 42899883689520. Its totient is φ = 9908634551552.

The previous prime is 20718054063787. The next prime is 20718054063821. The reversal of 20718054063808 is 80836045081702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7037381023 + ... + 7037383966.

Almost surely, 2^{20718054063808} is an apocalyptic number.

It is an amenable number.

20718054063808 is an abundant number, since it is smaller than the sum of its proper divisors (22181829625712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20718054063808 is a wasteful number, since it uses less digits than its factorization.

20718054063808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14074765024 (or 14074765014 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 20718054063808 in words is "twenty trillion, seven hundred eighteen billion, fifty-four million, sixty-three thousand, eight hundred eight".