21301344445 has 8 divisors (see below), whose sum is σ = 25580403000. Its totient is φ = 17028549120.

The previous prime is 21301344443. The next prime is 21301344469. The reversal of 21301344445 is 54444310312.

It can be written as a sum of positive squares in 4 ways, for example, as 2277081 + 21299067364 = 1509^2 + 145942^2 .

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

It is not a de Polignac number, because 21301344445 - 2¹ = 21301344443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301344443) 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, 1558320 + ... + 1571929.

It is an arithmetic number, because the mean of its divisors is an integer number (3197550375).

Almost surely, 2^21301344445 is an apocalyptic number.

It is an amenable number.

21301344445 is a deficient number, since it is larger than the sum of its proper divisors (4279058555).

21301344445 is a wasteful number, since it uses less digits than its factorization.

21301344445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131615.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 21301344445 its reverse (54444310312), we get a palindrome (75745654757).

The spelling of 21301344445 in words is "twenty-one billion, three hundred one million, three hundred forty-four thousand, four hundred forty-five".