20818464415773 has 8 divisors (see below), whose sum is σ = 29390773292928. Its totient is φ = 13062565907904.

The previous prime is 20818464415709. The next prime is 20818464415811. The reversal of 20818464415773 is 37751446481802.

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

It is not a de Polignac number, because 20818464415773 - 2⁶ = 20818464415709 is a prime.

It is a super-2 number, since 2×20818464415773² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20818464415673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204102592261 + ... + 204102592362.

It is an arithmetic number, because the mean of its divisors is an integer number (3673846661616).

Almost surely, 2^{20818464415773} is an apocalyptic number.

It is an amenable number.

20818464415773 is a deficient number, since it is larger than the sum of its proper divisors (8572308877155).

20818464415773 is a wasteful number, since it uses less digits than its factorization.

20818464415773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408205184643.

The product of its (nonzero) digits is 36126720, while the sum is 60.

The spelling of 20818464415773 in words is "twenty trillion, eight hundred eighteen billion, four hundred sixty-four million, four hundred fifteen thousand, seven hundred seventy-three".