21341999999 has 4 divisors (see below), whose sum is σ = 21343119336. Its totient is φ = 21340880664.

The previous prime is 21341999981. The next prime is 21342000077. The reversal of 21341999999 is 99999914312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21341999999 - 2¹² = 21341995903 is a prime.

It is a Duffinian number.

21341999999 is a modest number, since divided by 999999 gives 21341 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341999929) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 530564 + ... + 569369.

It is an arithmetic number, because the mean of its divisors is an integer number (5335779834).

Almost surely, 2^21341999999 is an apocalyptic number.

21341999999 is a deficient number, since it is larger than the sum of its proper divisors (1119337).

21341999999 is a wasteful number, since it uses less digits than its factorization.

21341999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119336.

The product of its digits is 12754584, while the sum is 65.

The spelling of 21341999999 in words is "twenty-one billion, three hundred forty-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".