21267985341 has 8 divisors (see below), whose sum is σ = 28436304960. Its totient is φ = 14139161312.

The previous prime is 21267985327. The next prime is 21267985351. The reversal of 21267985341 is 14358976212.

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 21267985341 - 2¹⁹ = 21267461053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21267985351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9872640 + ... + 9874793.

It is an arithmetic number, because the mean of its divisors is an integer number (3554538120).

Almost surely, 2^21267985341 is an apocalyptic number.

It is an amenable number.

21267985341 is a deficient number, since it is larger than the sum of its proper divisors (7168319619).

21267985341 is a wasteful number, since it uses less digits than its factorization.

21267985341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19747795.

The product of its digits is 725760, while the sum is 48.

The spelling of 21267985341 in words is "twenty-one billion, two hundred sixty-seven million, nine hundred eighty-five thousand, three hundred forty-one".