21410250505 has 8 divisors (see below), whose sum is σ = 29362629312. Its totient is φ = 14681314608.

The previous prime is 21410250487. The next prime is 21410250527. The reversal of 21410250505 is 50505201412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21410250505 - 2¹⁷ = 21410119433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21410250505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305860687 + ... + 305860756.

It is an arithmetic number, because the mean of its divisors is an integer number (3670328664).

Almost surely, 2^21410250505 is an apocalyptic number.

It is an amenable number.

21410250505 is a deficient number, since it is larger than the sum of its proper divisors (7952378807).

21410250505 is an equidigital number, since it uses as much as digits as its factorization.

21410250505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611721455.

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 21410250505 its reverse (50505201412), we get a palindrome (71915451917).

The spelling of 21410250505 in words is "twenty-one billion, four hundred ten million, two hundred fifty thousand, five hundred five".