21241784313 has 12 divisors (see below), whose sum is σ = 30726989488. Its totient is φ = 14140691640.

The previous prime is 21241784303. The next prime is 21241784321. The reversal of 21241784313 is 31348714212.

21241784313 is a `hidden beast` number, since 21 + 241 + 7 + 84 + 313 = 666.

It is not a de Polignac number, because 21241784313 - 2¹⁰ = 21241783289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21241784303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701595 + ... + 1714032.

Almost surely, 2^21241784313 is an apocalyptic number.

It is an amenable number.

21241784313 is a deficient number, since it is larger than the sum of its proper divisors (9485205175).

21241784313 is a wasteful number, since it uses less digits than its factorization.

21241784313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416324 (or 3416321 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The spelling of 21241784313 in words is "twenty-one billion, two hundred forty-one million, seven hundred eighty-four thousand, three hundred thirteen".