21303232441 has 8 divisors (see below), whose sum is σ = 21527125704. Its totient is φ = 21079426560.

The previous prime is 21303232411. The next prime is 21303232471. The reversal of 21303232441 is 14423230312.

It is an interprime number because it is at equal distance from previous prime (21303232411) and next prime (21303232471).

It can be written as a sum of positive squares in 4 ways, for example, as 7747520400 + 13555712041 = 88020^2 + 116429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21303232441 - 2¹³ = 21303224249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303232411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544971 + ... + 582751.

It is an arithmetic number, because the mean of its divisors is an integer number (2690890713).

Almost surely, 2^21303232441 is an apocalyptic number.

It is an amenable number.

21303232441 is a deficient number, since it is larger than the sum of its proper divisors (223893263).

21303232441 is an equidigital number, since it uses as much as digits as its factorization.

21303232441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43691.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21303232441 its reverse (14423230312), we get a palindrome (35726462753).

The spelling of 21303232441 in words is "twenty-one billion, three hundred three million, two hundred thirty-two thousand, four hundred forty-one".