21034166 has 8 divisors (see below), whose sum is σ = 31841040. Its totient is φ = 10420488.

The previous prime is 21034133. The next prime is 21034183. The reversal of 21034166 is 66143012.

It is a happy number.

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

It is a super-2 number, since 2×21034166² = 884872278631112, which contains 22 as substring.

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, 48026 + ... + 48461.

It is an arithmetic number, because the mean of its divisors is an integer number (3980130).

Almost surely, 2^21034166 is an apocalyptic number.

21034166 is a deficient number, since it is larger than the sum of its proper divisors (10806874).

21034166 is a wasteful number, since it uses less digits than its factorization.

21034166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96598.

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

The square root of 21034166 is about 4586.3019961620. The cubic root of 21034166 is about 276.0419578444.

Adding to 21034166 its reverse (66143012), we get a palindrome (87177178).

The spelling of 21034166 in words is "twenty-one million, thirty-four thousand, one hundred sixty-six".