21441452 has 12 divisors (see below), whose sum is σ = 37663920. Its totient is φ = 10680336.

The previous prime is 21441449. The next prime is 21441467. The reversal of 21441452 is 25414412.

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 3 ways as a sum of consecutive naturals, for example, 8888 + ... + 11039.

It is an arithmetic number, because the mean of its divisors is an integer number (3138660).

Almost surely, 2^21441452 is an apocalyptic number.

It is an amenable number.

21441452 is a deficient number, since it is larger than the sum of its proper divisors (16222468).

21441452 is a wasteful number, since it uses less digits than its factorization.

21441452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200 (or 20198 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 21441452 is about 4630.4915505808. The cubic root of 21441452 is about 277.8122535461.

Adding to 21441452 its reverse (25414412), we get a palindrome (46855864).

The spelling of 21441452 in words is "twenty-one million, four hundred forty-one thousand, four hundred fifty-two".