21752333045 has 8 divisors (see below), whose sum is σ = 26460372696. Its totient is φ = 17163484416.

The previous prime is 21752333039. The next prime is 21752333081. The reversal of 21752333045 is 54033325712.

It can be written as a sum of positive squares in 4 ways, for example, as 5520044209 + 16232288836 = 74297^2 + 127406^2 .

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 21752333045 - 2¹⁴ = 21752316661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21752332996 and 21752333014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29797352 + ... + 29798081.

It is an arithmetic number, because the mean of its divisors is an integer number (3307546587).

Almost surely, 2^21752333045 is an apocalyptic number.

It is an amenable number.

21752333045 is a deficient number, since it is larger than the sum of its proper divisors (4708039651).

21752333045 is an equidigital number, since it uses as much as digits as its factorization.

21752333045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59595511.

The product of its (nonzero) digits is 75600, while the sum is 35.

Adding to 21752333045 its reverse (54033325712), we get a palindrome (75785658757).

The spelling of 21752333045 in words is "twenty-one billion, seven hundred fifty-two million, three hundred thirty-three thousand, forty-five".