21324135004 has 12 divisors (see below), whose sum is σ = 37321862704. Its totient is φ = 10660745664.

The previous prime is 21324134999. The next prime is 21324135059. The reversal of 21324135004 is 40053142312.

It is a self number, because there is not a number n which added to its sum of digits gives 21324135004.

It is a congruent number.

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, 293709 + ... + 359044.

Almost surely, 2^21324135004 is an apocalyptic number.

It is an amenable number.

21324135004 is a deficient number, since it is larger than the sum of its proper divisors (15997727700).

21324135004 is a wasteful number, since it uses less digits than its factorization.

21324135004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660924 (or 660922 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21324135004 its reverse (40053142312), we get a palindrome (61377277316).

The spelling of 21324135004 in words is "twenty-one billion, three hundred twenty-four million, one hundred thirty-five thousand, four".