21016341 has 28 divisors (see below), whose sum is σ = 31898112. Its totient is φ = 13839336.

The previous prime is 21016309. The next prime is 21016381. The reversal of 21016341 is 14361012.

It is a happy number.

It is not a de Polignac number, because 21016341 - 2⁵ = 21016309 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21016381) 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 27 ways as a sum of consecutive naturals, for example, 92470 + ... + 92696.

Almost surely, 2^21016341 is an apocalyptic number.

It is an amenable number.

21016341 is a deficient number, since it is larger than the sum of its proper divisors (10881771).

21016341 is an equidigital number, since it uses as much as digits as its factorization.

21016341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21016341 is about 4584.3582975156. The cubic root of 21016341 is about 275.9639603226.

Adding to 21016341 its reverse (14361012), we get a palindrome (35377353).

The spelling of 21016341 in words is "twenty-one million, sixteen thousand, three hundred forty-one".