21552230033045 has 16 divisors (see below), whose sum is σ = 26161600313520. Its totient is φ = 17042940616704.

The previous prime is 21552230033039. The next prime is 21552230033083. The reversal of 21552230033045 is 54033003225512.

It can be written as a sum of positive squares in 8 ways, for example, as 1108728973444 + 20443501059601 = 1052962^2 + 4521449^2 .

It is a cyclic number.

It is not a de Polignac number, because 21552230033045 - 2²⁴ = 21552213255829 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21552230032996 and 21552230033014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27072152 + ... + 27856881.

It is an arithmetic number, because the mean of its divisors is an integer number (1635100019595).

Almost surely, 2^{21552230033045} is an apocalyptic number.

It is an amenable number.

21552230033045 is a deficient number, since it is larger than the sum of its proper divisors (4609370280475).

21552230033045 is an equidigital number, since it uses as much as digits as its factorization.

21552230033045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54929944.

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 21552230033045 its reverse (54033003225512), we get a palindrome (75585233258557).

The spelling of 21552230033045 in words is "twenty-one trillion, five hundred fifty-two billion, two hundred thirty million, thirty-three thousand, forty-five".