20536473073673 has 4 divisors (see below), whose sum is σ = 20583901418388. Its totient is φ = 20489044728960.

The previous prime is 20536473073639. The next prime is 20536473073679. The reversal of 20536473073673 is 37637037463502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5535352569289 + 15001120504384 = 2352733^2 + 3873128^2 .

It is a cyclic number.

It is not a de Polignac number, because 20536473073673 - 2¹⁰ = 20536473072649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20536473073679) 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, 23714171708 + ... + 23714172573.

It is an arithmetic number, because the mean of its divisors is an integer number (5145975354597).

Almost surely, 2^{20536473073673} is an apocalyptic number.

It is an amenable number.

20536473073673 is a deficient number, since it is larger than the sum of its proper divisors (47428344715).

20536473073673 is an equidigital number, since it uses as much as digits as its factorization.

20536473073673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47428344714.

The product of its (nonzero) digits is 40007520, while the sum is 56.

The spelling of 20536473073673 in words is "twenty trillion, five hundred thirty-six billion, four hundred seventy-three million, seventy-three thousand, six hundred seventy-three".