21160336360644 has 72 divisors (see below), whose sum is σ = 57763592752320. Its totient is φ = 6492736539072.

The previous prime is 21160336360633. The next prime is 21160336360663. The reversal of 21160336360644 is 44606363306112.

21160336360644 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 0 + 3 + 3 + 636 + 0 + 6 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21160336360644.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62804682 + ... + 63140705.

It is an arithmetic number, because the mean of its divisors is an integer number (802272121560).

Almost surely, 2^{21160336360644} is an apocalyptic number.

It is an amenable number.

21160336360644 is an abundant number, since it is smaller than the sum of its proper divisors (36603256391676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21160336360644 is a wasteful number, since it uses less digits than its factorization.

21160336360644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125945769 (or 125945764 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

Adding to 21160336360644 its reverse (44606363306112), we get a palindrome (65766699666756).

The spelling of 21160336360644 in words is "twenty-one trillion, one hundred sixty billion, three hundred thirty-six million, three hundred sixty thousand, six hundred forty-four".