20542302134005 has 8 divisors (see below), whose sum is σ = 26100807417432. Its totient is φ = 15467145136128.

The previous prime is 20542302133987. The next prime is 20542302134009. The reversal of 20542302134005 is 50043120324502.

It can be written as a sum of positive squares in 4 ways, for example, as 3072058947441 + 17470243186564 = 1752729^2 + 4179742^2 .

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 20542302134005 - 2¹¹ = 20542302131957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542302134009) 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, 120837071292 + ... + 120837071461.

It is an arithmetic number, because the mean of its divisors is an integer number (3262600927179).

Almost surely, 2^{20542302134005} is an apocalyptic number.

It is an amenable number.

20542302134005 is a deficient number, since it is larger than the sum of its proper divisors (5558505283427).

20542302134005 is a wasteful number, since it uses less digits than its factorization.

20542302134005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241674142775.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20542302134005 its reverse (50043120324502), we get a palindrome (70585422458507).

The spelling of 20542302134005 in words is "twenty trillion, five hundred forty-two billion, three hundred two million, one hundred thirty-four thousand, five".