21144462 has 8 divisors (see below), whose sum is σ = 42288936. Its totient is φ = 7048152.

The previous prime is 21144437. The next prime is 21144467. The reversal of 21144462 is 26444112.

It is a happy number.

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

21144462 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144467) 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, 1762033 + ... + 1762044.

It is an arithmetic number, because the mean of its divisors is an integer number (5286117).

Almost surely, 2^21144462 is an apocalyptic number.

21144462 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21144462 is a wasteful number, since it uses less digits than its factorization.

21144462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524082.

The product of its digits is 1536, while the sum is 24.

The square root of 21144462 is about 4598.3107767962. The cubic root of 21144462 is about 276.5236069473.

Adding to 21144462 its reverse (26444112), we get a palindrome (47588574).

The spelling of 21144462 in words is "twenty-one million, one hundred forty-four thousand, four hundred sixty-two".