21116410 has 32 divisors (see below), whose sum is σ = 45728640. Its totient is φ = 6858432.

The previous prime is 21116401. The next prime is 21116411. The reversal of 21116410 is 1461112.

It is not an unprimeable number, because it can be changed into a prime (21116411) 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 15 ways as a sum of consecutive naturals, for example, 6609 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (1429020).

Almost surely, 2^21116410 is an apocalyptic number.

21116410 is an abundant number, since it is smaller than the sum of its proper divisors (24612230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21116410 is a wasteful number, since it uses less digits than its factorization.

21116410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15910.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21116410 is about 4595.2595138904. The cubic root of 21116410 is about 276.4012664320.

Adding to 21116410 its reverse (1461112), we get a palindrome (22577522).

The spelling of 21116410 in words is "twenty-one million, one hundred sixteen thousand, four hundred ten".