13140540645021 has 24 divisors (see below), whose sum is σ = 19006778077560. Its totient is φ = 8748368326656.

The previous prime is 13140540645019. The next prime is 13140540645047. The reversal of 13140540645021 is 12054604504131.

13140540645021 is a `hidden beast` number, since 1 + 3 + 1 + 4 + 0 + 5 + 4 + 0 + 645 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5607376640100 + 7533164004921 = 2367990^2 + 2744661^2 .

It is not a de Polignac number, because 13140540645021 - 2¹ = 13140540645019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140540645121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23855911 + ... + 24400523.

It is an arithmetic number, because the mean of its divisors is an integer number (791949086565).

Almost surely, 2^{13140540645021} is an apocalyptic number.

It is an amenable number.

13140540645021 is a deficient number, since it is larger than the sum of its proper divisors (5866237432539).

13140540645021 is a wasteful number, since it uses less digits than its factorization.

13140540645021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548285 (or 548282 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 13140540645021 in words is "thirteen trillion, one hundred forty billion, five hundred forty million, six hundred forty-five thousand, twenty-one".