21105049410 has 24 divisors (see below), whose sum is σ = 54873128700. Its totient is φ = 5628013152.

The previous prime is 21105049403. The next prime is 21105049439. The reversal of 21105049410 is 1494050112.

21105049410 is a `hidden beast` number, since 2 + 110 + 50 + 494 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19390841001 + 1714208409 = 139251^2 + 41403^2 .

It is a super-2 number, since 2×21105049410² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117250185 + ... + 117250364.

Almost surely, 2^21105049410 is an apocalyptic number.

21105049410 is an abundant number, since it is smaller than the sum of its proper divisors (33768079290).

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

21105049410 is a wasteful number, since it uses less digits than its factorization.

21105049410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234500562 (or 234500559 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 21105049410 its reverse (1494050112), we get a palindrome (22599099522).

The spelling of 21105049410 in words is "twenty-one billion, one hundred five million, forty-nine thousand, four hundred ten".