21424203324 has 48 divisors (see below), whose sum is σ = 55676283040. Its totient is φ = 7124423040.

The previous prime is 21424203289. The next prime is 21424203377. The reversal of 21424203324 is 42330242412.

21424203324 is a `hidden beast` number, since 2 + 1 + 424 + 203 + 32 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190129 + ... + 281064.

Almost surely, 2^21424203324 is an apocalyptic number.

It is an amenable number.

21424203324 is an abundant number, since it is smaller than the sum of its proper divisors (34252079716).

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

21424203324 is a wasteful number, since it uses less digits than its factorization.

21424203324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471627 (or 471619 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21424203324 its reverse (42330242412), we get a palindrome (63754445736).

The spelling of 21424203324 in words is "twenty-one billion, four hundred twenty-four million, two hundred three thousand, three hundred twenty-four".