21424002321004 has 12 divisors (see below), whose sum is σ = 37494179018800. Its totient is φ = 10711379744208.

The previous prime is 21424002320993. The next prime is 21424002321047. The reversal of 21424002321004 is 40012320042412.

It is a self number, because there is not a number n which added to its sum of digits gives 21424002321004.

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, 155276499 + ... + 155414410.

Almost surely, 2^{21424002321004} is an apocalyptic number.

It is an amenable number.

21424002321004 is a deficient number, since it is larger than the sum of its proper divisors (16070176697796).

21424002321004 is a wasteful number, since it uses less digits than its factorization.

21424002321004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310708152 (or 310708150 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21424002321004 its reverse (40012320042412), we get a palindrome (61436322363416).

The spelling of 21424002321004 in words is "twenty-one trillion, four hundred twenty-four billion, two million, three hundred twenty-one thousand, four".