21036466 has 16 divisors (see below), whose sum is σ = 34509888. Its totient is φ = 9538000.

The previous prime is 21036451. The next prime is 21036469. The reversal of 21036466 is 66463012.

It is not an unprimeable number, because it can be changed into a prime (21036469) 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 7 ways as a sum of consecutive naturals, for example, 10116 + ... + 12016.

It is an arithmetic number, because the mean of its divisors is an integer number (2156868).

Almost surely, 2^21036466 is an apocalyptic number.

21036466 is a deficient number, since it is larger than the sum of its proper divisors (13473422).

21036466 is a wasteful number, since it uses less digits than its factorization.

21036466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 21036466 is about 4586.5527359881. The cubic root of 21036466 is about 276.0520188306.

Adding to 21036466 its reverse (66463012), we get a palindrome (87499478).

The spelling of 21036466 in words is "twenty-one million, thirty-six thousand, four hundred sixty-six".