21102466 has 16 divisors (see below), whose sum is σ = 39464640. Its totient is φ = 8221680.

The previous prime is 21102463. The next prime is 21102467. The reversal of 21102466 is 66420112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (21102463) 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, 68361 + ... + 68668.

It is an arithmetic number, because the mean of its divisors is an integer number (2466540).

Almost surely, 2^21102466 is an apocalyptic number.

21102466 is a deficient number, since it is larger than the sum of its proper divisors (18362174).

21102466 is a wasteful number, since it uses less digits than its factorization.

21102466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137049.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21102466 is about 4593.7420476122. The cubic root of 21102466 is about 276.3404134758.

Adding to 21102466 its reverse (66420112), we get a palindrome (87522578).

The spelling of 21102466 in words is "twenty-one million, one hundred two thousand, four hundred sixty-six".