21493314 has 24 divisors (see below), whose sum is σ = 46654140. Its totient is φ = 7151328.

The previous prime is 21493309. The next prime is 21493331. The reversal of 21493314 is 41339412.

It can be written as a sum of positive squares in 2 ways, for example, as 19580625 + 1912689 = 4425^2 + 1383^2 .

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 11 ways as a sum of consecutive naturals, for example, 18684 + ... + 19800.

Almost surely, 2^21493314 is an apocalyptic number.

21493314 is an abundant number, since it is smaller than the sum of its proper divisors (25160826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21493314 is a wasteful number, since it uses less digits than its factorization.

21493314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2191 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 21493314 is about 4636.0882217663. The cubic root of 21493314 is about 278.0360614331.

It can be divided in two parts, 214 and 93314, that added together give a triangular number (93528 = T₄₃₂).

The spelling of 21493314 in words is "twenty-one million, four hundred ninety-three thousand, three hundred fourteen".