21060116 has 48 divisors (see below), whose sum is σ = 46472832. Its totient is φ = 8112000.

The previous prime is 21060097. The next prime is 21060131. The reversal of 21060116 is 61106012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21060094 and 21060103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30770 + ... + 31446.

It is an arithmetic number, because the mean of its divisors is an integer number (968184).

Almost surely, 2^21060116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21060116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23236416).

21060116 is an abundant number, since it is smaller than the sum of its proper divisors (25412716).

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

21060116 is a wasteful number, since it uses less digits than its factorization.

21060116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 21060116 is about 4589.1302008115. The cubic root of 21060116 is about 276.1554295016.

Adding to 21060116 its reverse (61106012), we get a palindrome (82166128).

The spelling of 21060116 in words is "twenty-one million, sixty thousand, one hundred sixteen".