21030003442 has 24 divisors (see below), whose sum is σ = 38296859904. Its totient is φ = 8482688832.

The previous prime is 21030003439. The next prime is 21030003451. The reversal of 21030003442 is 24430003012.

It is a super-2 number, since 2×21030003442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2594818 + ... + 2602909.

It is an arithmetic number, because the mean of its divisors is an integer number (1595702496).

Almost surely, 2^21030003442 is an apocalyptic number.

21030003442 is a deficient number, since it is larger than the sum of its proper divisors (17266856462).

21030003442 is a wasteful number, since it uses less digits than its factorization.

21030003442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197770 (or 5197753 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21030003442 its reverse (24430003012), we get a palindrome (45460006454).

The spelling of 21030003442 in words is "twenty-one billion, thirty million, three thousand, four hundred forty-two".