21230352560442 has 8 divisors (see below), whose sum is σ = 42460705120896. Its totient is φ = 7076784186812.

The previous prime is 21230352560357. The next prime is 21230352560489. The reversal of 21230352560442 is 24406525303212.

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

21230352560442 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21230352560442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769196046698 + ... + 1769196046709.

It is an arithmetic number, because the mean of its divisors is an integer number (5307588140112).

Almost surely, 2^{21230352560442} is an apocalyptic number.

21230352560442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21230352560442 is a wasteful number, since it uses less digits than its factorization.

21230352560442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538392093412.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 21230352560442 its reverse (24406525303212), we get a palindrome (45636877863654).

The spelling of 21230352560442 in words is "twenty-one trillion, two hundred thirty billion, three hundred fifty-two million, five hundred sixty thousand, four hundred forty-two".