21344030012 has 24 divisors (see below), whose sum is σ = 38720115504. Its totient is φ = 10286531712.

The previous prime is 21344030003. The next prime is 21344030017. The reversal of 21344030012 is 21003044312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344030017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658073 + ... + 689744.

It is an arithmetic number, because the mean of its divisors is an integer number (1613338146).

Almost surely, 2^21344030012 is an apocalyptic number.

It is an amenable number.

21344030012 is a deficient number, since it is larger than the sum of its proper divisors (17376085492).

21344030012 is a wasteful number, since it uses less digits than its factorization.

21344030012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347965 (or 1347963 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21344030012 its reverse (21003044312), we get a palindrome (42347074324).

The spelling of 21344030012 in words is "twenty-one billion, three hundred forty-four million, thirty thousand, twelve".