21431331333304 has 32 divisors (see below), whose sum is σ = 42301359262800. Its totient is φ = 10151040303360.

The previous prime is 21431331333281. The next prime is 21431331333317. The reversal of 21431331333304 is 40333313313412.

It is a self number, because there is not a number n which added to its sum of digits gives 21431331333304.

It is a congruent number.

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, 2052907 + ... + 6861274.

Almost surely, 2^{21431331333304} is an apocalyptic number.

It is an amenable number.

21431331333304 is a deficient number, since it is larger than the sum of its proper divisors (20870027929496).

21431331333304 is a wasteful number, since it uses less digits than its factorization.

21431331333304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930023 (or 8930019 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 34.

Adding to 21431331333304 its reverse (40333313313412), we get a palindrome (61764644646716).

The spelling of 21431331333304 in words is "twenty-one trillion, four hundred thirty-one billion, three hundred thirty-one million, three hundred thirty-three thousand, three hundred four".