21445014 has 8 divisors (see below), whose sum is σ = 42890040. Its totient is φ = 7148336.

The previous prime is 21445013. The next prime is 21445031. The reversal of 21445014 is 41054412.

It is a happy number.

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

21445014 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21445013) 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 3 ways as a sum of consecutive naturals, for example, 1787079 + ... + 1787090.

It is an arithmetic number, because the mean of its divisors is an integer number (5361255).

Almost surely, 2^21445014 is an apocalyptic number.

21445014 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.

21445014 is a wasteful number, since it uses less digits than its factorization.

21445014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574174.

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

The square root of 21445014 is about 4630.8761590006. The cubic root of 21445014 is about 277.8276367154.

Adding to 21445014 its reverse (41054412), we get a palindrome (62499426).

The spelling of 21445014 in words is "twenty-one million, four hundred forty-five thousand, fourteen".