20136537335441 has 4 divisors (see below), whose sum is σ = 20188302213300. Its totient is φ = 20084772457584.

The previous prime is 20136537335419. The next prime is 20136537335449. The reversal of 20136537335441 is 14453373563102.

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 2700776707216 + 17435760628225 = 1643404^2 + 4175615^2 .

It is a cyclic number.

It is not a de Polignac number, because 20136537335441 - 2³⁸ = 19861659428497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20136537335449) 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, 25882438346 + ... + 25882439123.

It is an arithmetic number, because the mean of its divisors is an integer number (5047075553325).

Almost surely, 2^{20136537335441} is an apocalyptic number.

It is an amenable number.

20136537335441 is a deficient number, since it is larger than the sum of its proper divisors (51764877859).

20136537335441 is an equidigital number, since it uses as much as digits as its factorization.

20136537335441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51764877858.

The product of its (nonzero) digits is 2721600, while the sum is 47.

The spelling of 20136537335441 in words is "twenty trillion, one hundred thirty-six billion, five hundred thirty-seven million, three hundred thirty-five thousand, four hundred forty-one".