21342130445 has 16 divisors (see below), whose sum is σ = 27345555072. Its totient is φ = 15951566400.

The previous prime is 21342130421. The next prime is 21342130493. The reversal of 21342130445 is 54403124312.

It is not a de Polignac number, because 21342130445 - 2⁸ = 21342130189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2153006 + ... + 2162895.

It is an arithmetic number, because the mean of its divisors is an integer number (1709097192).

Almost surely, 2^21342130445 is an apocalyptic number.

It is an amenable number.

21342130445 is a deficient number, since it is larger than the sum of its proper divisors (6003424627).

21342130445 is a wasteful number, since it uses less digits than its factorization.

21342130445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315972.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21342130445 its reverse (54403124312), we get a palindrome (75745254757).

The spelling of 21342130445 in words is "twenty-one billion, three hundred forty-two million, one hundred thirty thousand, four hundred forty-five".