21454334 has 16 divisors (see below), whose sum is σ = 35925120. Its totient is φ = 9524760.

The previous prime is 21454333. The next prime is 21454373. The reversal of 21454334 is 43345412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10394 + ... + 12285.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^21454334 is an apocalyptic number.

21454334 is a deficient number, since it is larger than the sum of its proper divisors (14470786).

21454334 is a wasteful number, since it uses less digits than its factorization.

21454334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22735.

The product of its digits is 5760, while the sum is 26.

The square root of 21454334 is about 4631.8823387474. The cubic root of 21454334 is about 277.8678788365.

Adding to 21454334 its reverse (43345412), we get a palindrome (64799746).

The spelling of 21454334 in words is "twenty-one million, four hundred fifty-four thousand, three hundred thirty-four".