21240324401336 has 16 divisors (see below), whose sum is σ = 39853055282040. Its totient is φ = 10612842992800.

The previous prime is 21240324401323. The next prime is 21240324401369. The reversal of 21240324401336 is 63310442304212.

It is a junction number, because it is equal to n+sod(n) for n = 21240324401296 and 21240324401305.

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, 914888651 + ... + 914911866.

Almost surely, 2^{21240324401336} is an apocalyptic number.

It is an amenable number.

21240324401336 is a deficient number, since it is larger than the sum of its proper divisors (18612730880704).

21240324401336 is a wasteful number, since it uses less digits than its factorization.

21240324401336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829801974 (or 1829801970 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 21240324401336 its reverse (63310442304212), we get a palindrome (84550766705548).

The spelling of 21240324401336 in words is "twenty-one trillion, two hundred forty billion, three hundred twenty-four million, four hundred one thousand, three hundred thirty-six".