21424011324 has 48 divisors (see below), whose sum is σ = 51340141440. Its totient is φ = 6950766400.

The previous prime is 21424011313. The next prime is 21424011353. The reversal of 21424011324 is 42311042412.

It is a super-2 number, since 2×21424011324² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21424011294 and 21424011303.

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, 78294 + ... + 221309.

It is an arithmetic number, because the mean of its divisors is an integer number (1069586280).

Almost surely, 2^21424011324 is an apocalyptic number.

It is an amenable number.

21424011324 is an abundant number, since it is smaller than the sum of its proper divisors (29916130116).

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

21424011324 is a wasteful number, since it uses less digits than its factorization.

21424011324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299770 (or 299768 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21424011324 its reverse (42311042412), we get a palindrome (63735053736).

The spelling of 21424011324 in words is "twenty-one billion, four hundred twenty-four million, eleven thousand, three hundred twenty-four".