21160336360643 has 4 divisors (see below), whose sum is σ = 21347595974568. Its totient is φ = 20973076746720.

The previous prime is 21160336360633. The next prime is 21160336360663. The reversal of 21160336360643 is 34606363306112.

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 21160336360643 - 2⁴ = 21160336360627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21160336360594 and 21160336360603.

It is not an unprimeable number, because it can be changed into a prime (21160336360633) 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, 93629806793 + ... + 93629807018.

It is an arithmetic number, because the mean of its divisors is an integer number (5336898993642).

Almost surely, 2^{21160336360643} is an apocalyptic number.

21160336360643 is a deficient number, since it is larger than the sum of its proper divisors (187259613925).

21160336360643 is a wasteful number, since it uses less digits than its factorization.

21160336360643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187259613924.

The product of its (nonzero) digits is 839808, while the sum is 44.

Adding to 21160336360643 its reverse (34606363306112), we get a palindrome (55766699666755).

The spelling of 21160336360643 in words is "twenty-one trillion, one hundred sixty billion, three hundred thirty-six million, three hundred sixty thousand, six hundred forty-three".