21067016 has 16 divisors (see below), whose sum is σ = 39871440. Its totient is φ = 10434640.

The previous prime is 21067003. The next prime is 21067019. The reversal of 21067016 is 61076012.

It is a junction number, because it is equal to n+sod(n) for n = 21066982 and 21067000.

It is not an unprimeable number, because it can be changed into a prime (21067019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11450 + ... + 13161.

It is an arithmetic number, because the mean of its divisors is an integer number (2491965).

Almost surely, 2^21067016 is an apocalyptic number.

It is an amenable number.

21067016 is a deficient number, since it is larger than the sum of its proper divisors (18804424).

21067016 is a wasteful number, since it uses less digits than its factorization.

21067016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24724 (or 24720 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 21067016 is about 4589.8819156924. The cubic root of 21067016 is about 276.1855854673.

The spelling of 21067016 in words is "twenty-one million, sixty-seven thousand, sixteen".