21310051324 has 12 divisors (see below), whose sum is σ = 38578541400. Its totient is φ = 10287610928.

The previous prime is 21310051319. The next prime is 21310051339. The reversal of 21310051324 is 42315001312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21310051295 and 21310051304.

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, 91853554 + ... + 91853785.

It is an arithmetic number, because the mean of its divisors is an integer number (3214878450).

Almost surely, 2^21310051324 is an apocalyptic number.

It is an amenable number.

21310051324 is a deficient number, since it is larger than the sum of its proper divisors (17268490076).

21310051324 is a wasteful number, since it uses less digits than its factorization.

21310051324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183707372 (or 183707370 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21310051324 its reverse (42315001312), we get a palindrome (63625052636).

The spelling of 21310051324 in words is "twenty-one billion, three hundred ten million, fifty-one thousand, three hundred twenty-four".