21304054324 has 24 divisors (see below), whose sum is σ = 43759681280. Its totient is φ = 8883543456.

The previous prime is 21304054307. The next prime is 21304054351. The reversal of 21304054324 is 42345040312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 21304054292 and 21304054301.

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, 10280844 + ... + 10282915.

Almost surely, 2^21304054324 is an apocalyptic number.

It is an amenable number.

21304054324 is an abundant number, since it is smaller than the sum of its proper divisors (22455626956).

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

21304054324 is a wasteful number, since it uses less digits than its factorization.

21304054324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20563807 (or 20563805 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 21304054324 its reverse (42345040312), we get a palindrome (63649094636).

The spelling of 21304054324 in words is "twenty-one billion, three hundred four million, fifty-four thousand, three hundred twenty-four".