21105041360 has 40 divisors (see below), whose sum is σ = 52843779240. Its totient is φ = 7792630272.

The previous prime is 21105041329. The next prime is 21105041371. The reversal of 21105041360 is 6314050112.

It can be written as a sum of positive squares in 4 ways, for example, as 3593283136 + 17511758224 = 59944^2 + 132332^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10145615 + ... + 10147694.

It is an arithmetic number, because the mean of its divisors is an integer number (1321094481).

Almost surely, 2^21105041360 is an apocalyptic number.

21105041360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21105041360 is an abundant number, since it is smaller than the sum of its proper divisors (31738737880).

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

21105041360 is a wasteful number, since it uses less digits than its factorization.

21105041360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20293335 (or 20293329 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21105041360 its reverse (6314050112), we get a palindrome (27419091472).

The spelling of 21105041360 in words is "twenty-one billion, one hundred five million, forty-one thousand, three hundred sixty".