21189514 has 8 divisors (see below), whose sum is σ = 33653988. Its totient is φ = 9971520.

The previous prime is 21189481. The next prime is 21189521. The reversal of 21189514 is 41598112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19669225 + 1520289 = 4435^2 + 1233^2 .

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

It is an unprimeable number.

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, 311577 + ... + 311644.

Almost surely, 2^21189514 is an apocalyptic number.

21189514 is a deficient number, since it is larger than the sum of its proper divisors (12464474).

21189514 is a wasteful number, since it uses less digits than its factorization.

21189514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623240.

The product of its digits is 2880, while the sum is 31.

The square root of 21189514 is about 4603.2069256118. The cubic root of 21189514 is about 276.7198617090.

The spelling of 21189514 in words is "twenty-one million, one hundred eighty-nine thousand, five hundred fourteen".