21887014 has 8 divisors (see below), whose sum is σ = 32850648. Its totient is φ = 10936800.

The previous prime is 21886999. The next prime is 21887081. The reversal of 21887014 is 41078812.

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

It is a congruent number.

It is an unprimeable number.

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, 3649 + ... + 7555.

It is an arithmetic number, because the mean of its divisors is an integer number (4106331).

It is a vampire number, since it can be written as 2801 ⋅ 7814 (with its own digits).

Almost surely, 2^21887014 is an apocalyptic number.

21887014 is a deficient number, since it is larger than the sum of its proper divisors (10963634).

21887014 is a wasteful number, since it uses less digits than its factorization.

21887014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6710.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 21887014 is about 4678.3559077950. The cubic root of 21887014 is about 279.7234258794.

The spelling of 21887014 in words is "twenty-one million, eight hundred eighty-seven thousand, fourteen".