21033410841 has 27 divisors (see below), whose sum is σ = 31484246911. Its totient is φ = 13530625584.

The previous prime is 21033410821. The next prime is 21033410843. The reversal of 21033410841 is 14801433012.

The square root of 21033410841 is 145029.

It is a perfect power (a square), and thus also a powerful number.

21033410841 is a `hidden beast` number, since 210 + 33 + 410 + 8 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11029410441 + 10004000400 = 105021^2 + 100020^2 .

It is not a de Polignac number, because 21033410841 - 2¹⁵ = 21033378073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033410843) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12616690 + ... + 12618356.

Almost surely, 2^21033410841 is an apocalyptic number.

21033410841 is the 145029-th square number.

21033410841 is the 72515-th centered octagonal number.

It is an amenable number.

21033410841 is a deficient number, since it is larger than the sum of its proper divisors (10450836070).

21033410841 is an frugal number, since it uses more digits than its factorization.

21033410841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398 (or 1699 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Multiplying 21033410841 by its product of nonzero digits (2304), we get a square (48460978577664 = 6961392²).

Adding to 21033410841 its reverse (14801433012), we get a palindrome (35834843853).

The spelling of 21033410841 in words is "twenty-one billion, thirty-three million, four hundred ten thousand, eight hundred forty-one".