21236050366543 has 16 divisors (see below), whose sum is σ = 22371414114400. Its totient is φ = 20102459368320.

The previous prime is 21236050366529. The next prime is 21236050366547. The reversal of 21236050366543 is 34566305063212.

It is not a de Polignac number, because 21236050366543 - 2⁹ = 21236050366031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21236050366493 and 21236050366502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21236050366547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158348305 + ... + 158482357.

It is an arithmetic number, because the mean of its divisors is an integer number (1398213382150).

Almost surely, 2^{21236050366543} is an apocalyptic number.

21236050366543 is a deficient number, since it is larger than the sum of its proper divisors (1135363747857).

21236050366543 is a wasteful number, since it uses less digits than its factorization.

21236050366543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140602.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 21236050366543 in words is "twenty-one trillion, two hundred thirty-six billion, fifty million, three hundred sixty-six thousand, five hundred forty-three".