21054414 has 8 divisors (see below), whose sum is σ = 42108840. Its totient is φ = 7018136.

The previous prime is 21054403. The next prime is 21054419. The reversal of 21054414 is 41445012.

It is a happy number.

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

21054414 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054419) 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 3 ways as a sum of consecutive naturals, for example, 1754529 + ... + 1754540.

It is an arithmetic number, because the mean of its divisors is an integer number (5263605).

Almost surely, 2^21054414 is an apocalyptic number.

21054414 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21054414 is a wasteful number, since it uses less digits than its factorization.

21054414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509074.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 21054414 is about 4588.5089081313. The cubic root of 21054414 is about 276.1305043399.

Adding to 21054414 its reverse (41445012), we get a palindrome (62499426).

The spelling of 21054414 in words is "twenty-one million, fifty-four thousand, four hundred fourteen".