21230442034 has 32 divisors (see below), whose sum is σ = 34456855680. Its totient is φ = 9779357952.

The previous prime is 21230442017. The next prime is 21230442049. The reversal of 21230442034 is 43024403212.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 180939 + ... + 274225.

It is an arithmetic number, because the mean of its divisors is an integer number (1076776740).

Almost surely, 2^21230442034 is an apocalyptic number.

21230442034 is a deficient number, since it is larger than the sum of its proper divisors (13226413646).

21230442034 is a wasteful number, since it uses less digits than its factorization.

21230442034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93474.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21230442034 its reverse (43024403212), we get a palindrome (64254845246).

The spelling of 21230442034 in words is "twenty-one billion, two hundred thirty million, four hundred forty-two thousand, thirty-four".