21688333341 has 8 divisors (see below), whose sum is σ = 28955780544. Its totient is φ = 14439887520.

The previous prime is 21688333339. The next prime is 21688333349. The reversal of 21688333341 is 14333388612.

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

It is not a de Polignac number, because 21688333341 - 2¹ = 21688333339 is a prime.

It is a super-2 number, since 2×21688333341² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21688333293 and 21688333302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21688333349) 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 7 ways as a sum of consecutive naturals, for example, 4747681 + ... + 4752246.

It is an arithmetic number, because the mean of its divisors is an integer number (3619472568).

Almost surely, 2^21688333341 is an apocalyptic number.

It is an amenable number.

21688333341 is a deficient number, since it is larger than the sum of its proper divisors (7267447203).

21688333341 is an equidigital number, since it uses as much as digits as its factorization.

21688333341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500691.

The product of its digits is 248832, while the sum is 42.

The spelling of 21688333341 in words is "twenty-one billion, six hundred eighty-eight million, three hundred thirty-three thousand, three hundred forty-one".