21412016 has 20 divisors (see below), whose sum is σ = 41576952. Its totient is φ = 10682496.

The previous prime is 21411983. The next prime is 21412021. The reversal of 21412016 is 61021412.

It is a junction number, because it is equal to n+sod(n) for n = 21411985 and 21412003.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7820 + ... + 10196.

Almost surely, 2^21412016 is an apocalyptic number.

It is an amenable number.

21412016 is a deficient number, since it is larger than the sum of its proper divisors (20164936).

21412016 is a wasteful number, since it uses less digits than its factorization.

21412016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21412016 is about 4627.3119626842. The cubic root of 21412016 is about 277.6850633632.

Adding to 21412016 its reverse (61021412), we get a palindrome (82433428).

The spelling of 21412016 in words is "twenty-one million, four hundred twelve thousand, sixteen".