21303153727 has 4 divisors (see below), whose sum is σ = 21303576160. Its totient is φ = 21302731296.

The previous prime is 21303153721. The next prime is 21303153733. The reversal of 21303153727 is 72735130312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21303153721) and next prime (21303153733).

It is a cyclic number.

It is not a de Polignac number, because 21303153727 - 2¹¹ = 21303151679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303153692 and 21303153701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303153721) 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 in 3 ways as a sum of consecutive naturals, for example, 123402 + ... + 240487.

It is an arithmetic number, because the mean of its divisors is an integer number (5325894040).

Almost surely, 2^21303153727 is an apocalyptic number.

21303153727 is a deficient number, since it is larger than the sum of its proper divisors (422433).

21303153727 is an equidigital number, since it uses as much as digits as its factorization.

21303153727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422432.

The product of its (nonzero) digits is 26460, while the sum is 34.

The spelling of 21303153727 in words is "twenty-one billion, three hundred three million, one hundred fifty-three thousand, seven hundred twenty-seven".