21014066 has 16 divisors (see below), whose sum is σ = 32011200. Its totient is φ = 10345200.

The previous prime is 21014047. The next prime is 21014069. The reversal of 21014066 is 66041012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21014069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44765 + ... + 45231.

It is an arithmetic number, because the mean of its divisors is an integer number (2000700).

Almost surely, 2^21014066 is an apocalyptic number.

21014066 is a deficient number, since it is larger than the sum of its proper divisors (10997134).

21014066 is a wasteful number, since it uses less digits than its factorization.

21014066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 21014066 is about 4584.1101644703. The cubic root of 21014066 is about 275.9540023464.

Adding to 21014066 its reverse (66041012), we get a palindrome (87055078).

The spelling of 21014066 in words is "twenty-one million, fourteen thousand, sixty-six".