21403410441 has 32 divisors (see below), whose sum is σ = 33957993216. Its totient is φ = 11736576000.

The previous prime is 21403410409. The next prime is 21403410443. The reversal of 21403410441 is 14401430412.

It is not a de Polignac number, because 21403410441 - 2⁵ = 21403410409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21403410443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151240 + ... + 256281.

It is an arithmetic number, because the mean of its divisors is an integer number (1061187288).

Almost surely, 2^21403410441 is an apocalyptic number.

21403410441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21403410441 is a deficient number, since it is larger than the sum of its proper divisors (12554582775).

21403410441 is a wasteful number, since it uses less digits than its factorization.

21403410441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407633.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21403410441 its reverse (14401430412), we get a palindrome (35804840853).

The spelling of 21403410441 in words is "twenty-one billion, four hundred three million, four hundred ten thousand, four hundred forty-one".