20718054063807 has 4 divisors (see below), whose sum is σ = 27624072085080. Its totient is φ = 13812036042536.

The previous prime is 20718054063787. The next prime is 20718054063821. The reversal of 20718054063807 is 70836045081702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20718054063807 - 2³⁶ = 20649334587071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20718054063807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20718054062807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3453009010632 + ... + 3453009010637.

It is an arithmetic number, because the mean of its divisors is an integer number (6906018021270).

Almost surely, 2^{20718054063807} is an apocalyptic number.

20718054063807 is a deficient number, since it is larger than the sum of its proper divisors (6906018021273).

20718054063807 is an equidigital number, since it uses as much as digits as its factorization.

20718054063807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906018021272.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 20718054063807 in words is "twenty trillion, seven hundred eighteen billion, fifty-four million, sixty-three thousand, eight hundred seven".