20321304242506 has 8 divisors (see below), whose sum is σ = 30482021304864. Its totient is φ = 10160630474220.

The previous prime is 20321304242501. The next prime is 20321304242521. The reversal of 20321304242506 is 60524240312302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20321304242506² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20321304242501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9623460 + ... + 11543551.

It is an arithmetic number, because the mean of its divisors is an integer number (3810252663108).

Almost surely, 2^{20321304242506} is an apocalyptic number.

20321304242506 is a deficient number, since it is larger than the sum of its proper divisors (10160717062358).

20321304242506 is a wasteful number, since it uses less digits than its factorization.

20321304242506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21647036.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 20321304242506 its reverse (60524240312302), we get a palindrome (80845544554808).

The spelling of 20321304242506 in words is "twenty trillion, three hundred twenty-one billion, three hundred four million, two hundred forty-two thousand, five hundred six".