21441442502 has 32 divisors (see below), whose sum is σ = 33324480000. Its totient is φ = 10338807168.

The previous prime is 21441442499. The next prime is 21441442531. The reversal of 21441442502 is 20524414412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4465499 + ... + 4470297.

It is an arithmetic number, because the mean of its divisors is an integer number (1041390000).

Almost surely, 2^21441442502 is an apocalyptic number.

21441442502 is a deficient number, since it is larger than the sum of its proper divisors (11883037498).

21441442502 is a wasteful number, since it uses less digits than its factorization.

21441442502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360.

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 21441442502 its reverse (20524414412), we get a palindrome (41965856914).

The spelling of 21441442502 in words is "twenty-one billion, four hundred forty-one million, four hundred forty-two thousand, five hundred two".