21676341 has 8 divisors (see below), whose sum is σ = 28941664. Its totient is φ = 14430960.

The previous prime is 21676337. The next prime is 21676351. The reversal of 21676341 is 14367612.

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

It is not a de Polignac number, because 21676341 - 2² = 21676337 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21676299 and 21676308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230 + ... + 6951.

It is an arithmetic number, because the mean of its divisors is an integer number (3617708).

Almost surely, 2^21676341 is an apocalyptic number.

It is an amenable number.

21676341 is a deficient number, since it is larger than the sum of its proper divisors (7265323).

21676341 is an equidigital number, since it uses as much as digits as its factorization.

21676341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971.

The product of its digits is 6048, while the sum is 30.

The square root of 21676341 is about 4655.7857553801. The cubic root of 21676341 is about 278.8230401076.

The spelling of 21676341 in words is "twenty-one million, six hundred seventy-six thousand, three hundred forty-one".