21413066 has 8 divisors (see below), whose sum is σ = 32599200. Its totient is φ = 10546668.

The previous prime is 21413053. The next prime is 21413083. The reversal of 21413066 is 66031412.

It is a happy number.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79766 + ... + 80033.

It is an arithmetic number, because the mean of its divisors is an integer number (4074900).

Almost surely, 2^21413066 is an apocalyptic number.

21413066 is a deficient number, since it is larger than the sum of its proper divisors (11186134).

21413066 is a wasteful number, since it uses less digits than its factorization.

21413066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159868.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21413066 is about 4627.4254180916. The cubic root of 21413066 is about 277.6896023185.

Adding to 21413066 its reverse (66031412), we get a palindrome (87444478).

The spelling of 21413066 in words is "twenty-one million, four hundred thirteen thousand, sixty-six".