21231924683 has 2 divisors, whose sum is σ = 21231924684. Its totient is φ = 21231924682.

The previous prime is 21231924677. The next prime is 21231924719. The reversal of 21231924683 is 38642913212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21231924683 - 2¹⁸ = 21231662539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21231924683.

It is not a weakly prime, because it can be changed into another prime (21231924083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615962341 + 10615962342.

It is an arithmetic number, because the mean of its divisors is an integer number (10615962342).

Almost surely, 2^21231924683 is an apocalyptic number.

21231924683 is a deficient number, since it is larger than the sum of its proper divisors (1).

21231924683 is an equidigital number, since it uses as much as digits as its factorization.

21231924683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The spelling of 21231924683 in words is "twenty-one billion, two hundred thirty-one million, nine hundred twenty-four thousand, six hundred eighty-three".