21748341 has 8 divisors (see below), whose sum is σ = 29781664. Its totient is φ = 14106960.

The previous prime is 21748333. The next prime is 21748351. The reversal of 21748341 is 14384712.

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

It is not a de Polignac number, because 21748341 - 2³ = 21748333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21748299 and 21748308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21748351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97855 + ... + 98076.

It is an arithmetic number, because the mean of its divisors is an integer number (3722708).

Almost surely, 2^21748341 is an apocalyptic number.

It is an amenable number.

21748341 is a deficient number, since it is larger than the sum of its proper divisors (8033323).

21748341 is a wasteful number, since it uses less digits than its factorization.

21748341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195971.

The product of its digits is 5376, while the sum is 30.

The square root of 21748341 is about 4663.5116596831. The cubic root of 21748341 is about 279.1314112257.

The spelling of 21748341 in words is "twenty-one million, seven hundred forty-eight thousand, three hundred forty-one".