21414842 has 8 divisors (see below), whose sum is σ = 32562516. Its totient is φ = 10560672.

The previous prime is 21414803. The next prime is 21414853. The reversal of 21414842 is 24841412.

It can be written as a sum of positive squares in 2 ways, for example, as 21077281 + 337561 = 4591^2 + 581^2 .

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73193 + ... + 73484.

Almost surely, 2^21414842 is an apocalyptic number.

21414842 is a deficient number, since it is larger than the sum of its proper divisors (11147674).

21414842 is a wasteful number, since it uses less digits than its factorization.

21414842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146752.

The product of its digits is 2048, while the sum is 26.

The square root of 21414842 is about 4627.6173134779. The cubic root of 21414842 is about 277.6972792994.

The spelling of 21414842 in words is "twenty-one million, four hundred fourteen thousand, eight hundred forty-two".