21314434 has 8 divisors (see below), whose sum is σ = 32288508. Its totient is φ = 10551600.

The previous prime is 21314431. The next prime is 21314443. The reversal of 21314434 is 43441312.

It can be written as a sum of positive squares in 2 ways, for example, as 18896409 + 2418025 = 4347^2 + 1555^2 .

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 (21314431) by changing a digit.

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, 52557 + ... + 52960.

Almost surely, 2^21314434 is an apocalyptic number.

21314434 is a deficient number, since it is larger than the sum of its proper divisors (10974074).

21314434 is a wasteful number, since it uses less digits than its factorization.

21314434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105620.

The product of its digits is 1152, while the sum is 22.

The square root of 21314434 is about 4616.7557873468. The cubic root of 21314434 is about 277.2625851315.

Adding to 21314434 its reverse (43441312), we get a palindrome (64755746).

The spelling of 21314434 in words is "twenty-one million, three hundred fourteen thousand, four hundred thirty-four".