21004341 has 8 divisors (see below), whose sum is σ = 28689024. Its totient is φ = 13661280.

The previous prime is 21004331. The next prime is 21004351. The reversal of 21004341 is 14340012.

It is an interprime number because it is at equal distance from previous prime (21004331) and next prime (21004351).

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

It is not a de Polignac number, because 21004341 - 2⁵ = 21004309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21004341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85261 + ... + 85506.

It is an arithmetic number, because the mean of its divisors is an integer number (3586128).

Almost surely, 2^21004341 is an apocalyptic number.

It is an amenable number.

21004341 is a deficient number, since it is larger than the sum of its proper divisors (7684683).

21004341 is a wasteful number, since it uses less digits than its factorization.

21004341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170811.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21004341 is about 4583.0493124120. The cubic root of 21004341 is about 275.9114266297.

Adding to 21004341 its reverse (14340012), we get a palindrome (35344353).

It can be divided in two parts, 2100 and 4341, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 21004341 in words is "twenty-one million, four thousand, three hundred forty-one".