21416410 has 16 divisors (see below), whose sum is σ = 39204000. Its totient is φ = 8421136.

The previous prime is 21416389. The next prime is 21416411. The reversal of 21416410 is 1461412.

It is not an unprimeable number, because it can be changed into a prime (21416411) 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, 17560 + ... + 18739.

It is an arithmetic number, because the mean of its divisors is an integer number (2450250).

Almost surely, 2^21416410 is an apocalyptic number.

21416410 is a deficient number, since it is larger than the sum of its proper divisors (17787590).

21416410 is a wasteful number, since it uses less digits than its factorization.

21416410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36365.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21416410 is about 4627.7867280159. The cubic root of 21416410 is about 277.7040568217.

Adding to 21416410 its reverse (1461412), we get a palindrome (22877822).

The spelling of 21416410 in words is "twenty-one million, four hundred sixteen thousand, four hundred ten".