21676214 has 16 divisors (see below), whose sum is σ = 38024448. Its totient is φ = 9073512.

The previous prime is 21676211. The next prime is 21676219. The reversal of 21676214 is 41267612.

21676214 is nontrivially palindromic in base 6.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17402 + ... + 18605.

It is an arithmetic number, because the mean of its divisors is an integer number (2376528).

Almost surely, 2^21676214 is an apocalyptic number.

21676214 is a deficient number, since it is larger than the sum of its proper divisors (16348234).

21676214 is a wasteful number, since it uses less digits than its factorization.

21676214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36059.

The product of its digits is 4032, while the sum is 29.

The square root of 21676214 is about 4655.7721164164. The cubic root of 21676214 is about 278.8224955724.

The spelling of 21676214 in words is "twenty-one million, six hundred seventy-six thousand, two hundred fourteen".