20473053511681 has 8 divisors (see below), whose sum is σ = 21677559120000. Its totient is φ = 19268571052608.

The previous prime is 20473053511637. The next prime is 20473053511699. The reversal of 20473053511681 is 18611535037402.

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

It is a cyclic number.

It is not a de Polignac number, because 20473053511681 - 2²³ = 20473045123073 is a prime.

It is a super-2 number, since 2×20473053511681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20473053511181) 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, 3949821 + ... + 7519786.

It is an arithmetic number, because the mean of its divisors is an integer number (2709694890000).

Almost surely, 2^{20473053511681} is an apocalyptic number.

It is an amenable number.

20473053511681 is a deficient number, since it is larger than the sum of its proper divisors (1204505608319).

20473053511681 is a wasteful number, since it uses less digits than its factorization.

20473053511681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11574623.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 20473053511681 in words is "twenty trillion, four hundred seventy-three billion, fifty-three million, five hundred eleven thousand, six hundred eighty-one".