21320304630626 has 16 divisors (see below), whose sum is σ = 32516257844160. Its totient is φ = 10481676006480.

The previous prime is 21320304630617. The next prime is 21320304630641. The reversal of 21320304630626 is 62603640302312.

It is a self number, because there is not a number n which added to its sum of digits gives 21320304630626.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30652286 + ... + 31340121.

It is an arithmetic number, because the mean of its divisors is an integer number (2032266115260).

Almost surely, 2^{21320304630626} is an apocalyptic number.

21320304630626 is a deficient number, since it is larger than the sum of its proper divisors (11195953213534).

21320304630626 is a wasteful number, since it uses less digits than its factorization.

21320304630626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61995289.

The product of its (nonzero) digits is 186624, while the sum is 38.

Adding to 21320304630626 its reverse (62603640302312), we get a palindrome (83923944932938).

The spelling of 21320304630626 in words is "twenty-one trillion, three hundred twenty billion, three hundred four million, six hundred thirty thousand, six hundred twenty-six".