21364514 has 8 divisors (see below), whose sum is σ = 32262300. Its totient is φ = 10610416.

The previous prime is 21364513. The next prime is 21364517. The reversal of 21364514 is 41546312.

It can be written as a sum of positive squares in 2 ways, for example, as 18361225 + 3003289 = 4285^2 + 1733^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21364513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35549 + ... + 36144.

Almost surely, 2^21364514 is an apocalyptic number.

21364514 is a deficient number, since it is larger than the sum of its proper divisors (10897786).

21364514 is a wasteful number, since it uses less digits than its factorization.

21364514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71844.

The product of its digits is 2880, while the sum is 26.

The square root of 21364514 is about 4622.1763272294. The cubic root of 21364514 is about 277.4795656300.

The spelling of 21364514 in words is "twenty-one million, three hundred sixty-four thousand, five hundred fourteen".