21789193363 has 16 divisors (see below), whose sum is σ = 24994676736. Its totient is φ = 18607021920.

The previous prime is 21789193339. The next prime is 21789193367. The reversal of 21789193363 is 36339198712.

It is a cyclic number.

It is not a de Polignac number, because 21789193363 - 2⁹ = 21789192851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21789193363.

It is not an unprimeable number, because it can be changed into a prime (21789193367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2327470 + ... + 2336812.

It is an arithmetic number, because the mean of its divisors is an integer number (1562167296).

Almost surely, 2^21789193363 is an apocalyptic number.

21789193363 is a deficient number, since it is larger than the sum of its proper divisors (3205483373).

21789193363 is an equidigital number, since it uses as much as digits as its factorization.

21789193363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554.

The product of its digits is 1469664, while the sum is 52.

The spelling of 21789193363 in words is "twenty-one billion, seven hundred eighty-nine million, one hundred ninety-three thousand, three hundred sixty-three".