21084114 has 32 divisors (see below), whose sum is σ = 45130176. Its totient is φ = 6543360.

The previous prime is 21084113. The next prime is 21084139. The reversal of 21084114 is 41148012.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21084113) 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 15 ways as a sum of consecutive naturals, for example, 8829 + ... + 10959.

It is an arithmetic number, because the mean of its divisors is an integer number (1410318).

Almost surely, 2^21084114 is an apocalyptic number.

21084114 is an abundant number, since it is smaller than the sum of its proper divisors (24046062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21084114 is a wasteful number, since it uses less digits than its factorization.

21084114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 21084114 is about 4591.7441130795. The cubic root of 21084114 is about 276.2602827127.

The spelling of 21084114 in words is "twenty-one million, eighty-four thousand, one hundred fourteen".