21416662 has 8 divisors (see below), whose sum is σ = 32359896. Its totient is φ = 10630032.

The previous prime is 21416641. The next prime is 21416669. The reversal of 21416662 is 26661412.

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

It is a super-2 number, since 2×21416662² = 917346822444488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21416662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416669) 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 3 ways as a sum of consecutive naturals, for example, 38808 + ... + 39355.

It is an arithmetic number, because the mean of its divisors is an integer number (4044987).

Almost surely, 2^21416662 is an apocalyptic number.

21416662 is a deficient number, since it is larger than the sum of its proper divisors (10943234).

21416662 is a wasteful number, since it uses less digits than its factorization.

21416662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78302.

The product of its digits is 3456, while the sum is 28.

The square root of 21416662 is about 4627.8139547739. The cubic root of 21416662 is about 277.7051460355.

The spelling of 21416662 in words is "twenty-one million, four hundred sixteen thousand, six hundred sixty-two".