21013414424 has 16 divisors (see below), whose sum is σ = 39569254920. Its totient is φ = 10461613120.

The previous prime is 21013414369. The next prime is 21013414427. The reversal of 21013414424 is 42441431012.

It is a junction number, because it is equal to n+sod(n) for n = 21013414393 and 21013414402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013414427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5634782 + ... + 5638509.

Almost surely, 2^21013414424 is an apocalyptic number.

It is an amenable number.

21013414424 is a deficient number, since it is larger than the sum of its proper divisors (18555840496).

21013414424 is a wasteful number, since it uses less digits than its factorization.

21013414424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11273530 (or 11273526 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21013414424 its reverse (42441431012), we get a palindrome (63454845436).

The spelling of 21013414424 in words is "twenty-one billion, thirteen million, four hundred fourteen thousand, four hundred twenty-four".