21356160514043 has 4 divisors (see below), whose sum is σ = 21402286131168. Its totient is φ = 21310034896920.

The previous prime is 21356160514027. The next prime is 21356160514093. The reversal of 21356160514043 is 34041506165312.

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

It is a cyclic number.

It is not a de Polignac number, because 21356160514043 - 2⁴ = 21356160514027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21356160514093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23062807868 + ... + 23062808793.

It is an arithmetic number, because the mean of its divisors is an integer number (5350571532792).

Almost surely, 2^{21356160514043} is an apocalyptic number.

21356160514043 is a deficient number, since it is larger than the sum of its proper divisors (46125617125).

21356160514043 is an equidigital number, since it uses as much as digits as its factorization.

21356160514043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46125617124.

The product of its (nonzero) digits is 259200, while the sum is 41.

Adding to 21356160514043 its reverse (34041506165312), we get a palindrome (55397666679355).

The spelling of 21356160514043 in words is "twenty-one trillion, three hundred fifty-six billion, one hundred sixty million, five hundred fourteen thousand, forty-three".