21460466 has 8 divisors (see below), whose sum is σ = 32975964. Its totient is φ = 10468480.

The previous prime is 21460459. The next prime is 21460469. The reversal of 21460466 is 66406412.

It can be written as a sum of positive squares in 2 ways, for example, as 18309841 + 3150625 = 4279^2 + 1775^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21460469) 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, 130775 + ... + 130938.

Almost surely, 2^21460466 is an apocalyptic number.

21460466 is a deficient number, since it is larger than the sum of its proper divisors (11515498).

21460466 is a wasteful number, since it uses less digits than its factorization.

21460466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261756.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 21460466 is about 4632.5442253690. The cubic root of 21460466 is about 277.8943493782.

Adding to 21460466 its reverse (66406412), we get a palindrome (87866878).

The spelling of 21460466 in words is "twenty-one million, four hundred sixty thousand, four hundred sixty-six".