21341015 has 8 divisors (see below), whose sum is σ = 25661328. Its totient is φ = 17038080.

The previous prime is 21340931. The next prime is 21341017. The reversal of 21341015 is 51014312.

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

It is not a de Polignac number, because 21341015 - 2¹⁰ = 21339991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21340984 and 21341002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1466 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (3207666).

Almost surely, 2^21341015 is an apocalyptic number.

21341015 is a deficient number, since it is larger than the sum of its proper divisors (4320313).

21341015 is an equidigital number, since it uses as much as digits as its factorization.

21341015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8689.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21341015 is about 4619.6336434830. The cubic root of 21341015 is about 277.3777943092.

Adding to 21341015 its reverse (51014312), we get a palindrome (72355327).

The spelling of 21341015 in words is "twenty-one million, three hundred forty-one thousand, fifteen".