21160336360646 has 8 divisors (see below), whose sum is σ = 36274862332560. Its totient is φ = 9068715583128.

The previous prime is 21160336360633. The next prime is 21160336360663. The reversal of 21160336360646 is 64606363306112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21160336360646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755726298581 + ... + 755726298608.

It is an arithmetic number, because the mean of its divisors is an integer number (4534357791570).

Almost surely, 2^{21160336360646} is an apocalyptic number.

21160336360646 is a deficient number, since it is larger than the sum of its proper divisors (15114525971914).

21160336360646 is a wasteful number, since it uses less digits than its factorization.

21160336360646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511452597198.

The product of its (nonzero) digits is 1679616, while the sum is 47.

Adding to 21160336360646 its reverse (64606363306112), we get a palindrome (85766699666758).

The spelling of 21160336360646 in words is "twenty-one trillion, one hundred sixty billion, three hundred thirty-six million, three hundred sixty thousand, six hundred forty-six".