21302732741 has 4 divisors (see below), whose sum is σ = 21313233900. Its totient is φ = 21292231584.

The previous prime is 21302732729. The next prime is 21302732771. The reversal of 21302732741 is 14723720312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15788927716 + 5513805025 = 125654^2 + 74255^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302732741 - 2³⁰ = 20228990917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302732698 and 21302732707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302732771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5247536 + ... + 5251593.

It is an arithmetic number, because the mean of its divisors is an integer number (5328308475).

Almost surely, 2^21302732741 is an apocalyptic number.

It is an amenable number.

21302732741 is a deficient number, since it is larger than the sum of its proper divisors (10501159).

21302732741 is a wasteful number, since it uses less digits than its factorization.

21302732741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501158.

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 21302732741 in words is "twenty-one billion, three hundred two million, seven hundred thirty-two thousand, seven hundred forty-one".