20718057744545 has 32 divisors (see below), whose sum is σ = 28651661107200. Its totient is φ = 14087947962816.

The previous prime is 20718057744481. The next prime is 20718057744569. The reversal of 20718057744545 is 54544775081702.

20718057744545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 20718057744545 - 2⁶ = 20718057744481 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2356649 + ... + 6854918.

It is an arithmetic number, because the mean of its divisors is an integer number (895364409600).

Almost surely, 2^{20718057744545} is an apocalyptic number.

It is an amenable number.

20718057744545 is a deficient number, since it is larger than the sum of its proper divisors (7933603362655).

20718057744545 is a wasteful number, since it uses less digits than its factorization.

20718057744545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212117.

The product of its (nonzero) digits is 43904000, while the sum is 59.

The spelling of 20718057744545 in words is "twenty trillion, seven hundred eighteen billion, fifty-seven million, seven hundred forty-four thousand, five hundred forty-five".