21346166 has 8 divisors (see below), whose sum is σ = 33052224. Its totient is φ = 10328760.

The previous prime is 21346153. The next prime is 21346181. The reversal of 21346166 is 66164312.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172085 + ... + 172208.

It is an arithmetic number, because the mean of its divisors is an integer number (4131528).

Almost surely, 2^21346166 is an apocalyptic number.

21346166 is a deficient number, since it is larger than the sum of its proper divisors (11706058).

21346166 is a wasteful number, since it uses less digits than its factorization.

21346166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344326.

The product of its digits is 5184, while the sum is 29.

The square root of 21346166 is about 4620.1911215879. The cubic root of 21346166 is about 277.4001090567.

It can be divided in two parts, 21346 and 166, that added together give a palindrome (21512).

The spelling of 21346166 in words is "twenty-one million, three hundred forty-six thousand, one hundred sixty-six".