21550060633 has 2 divisors, whose sum is σ = 21550060634. Its totient is φ = 21550060632.

The previous prime is 21550060619. The next prime is 21550060709. The reversal of 21550060633 is 33606005512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11683015744 + 9867044889 = 108088^2 + 99333^2 .

It is a cyclic number.

It is not a de Polignac number, because 21550060633 - 2⁹ = 21550060121 is a prime.

It is a super-2 number, since 2×21550060633² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21550060595 and 21550060604.

It is not a weakly prime, because it can be changed into another prime (21550060333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10775030316 + 10775030317.

It is an arithmetic number, because the mean of its divisors is an integer number (10775030317).

Almost surely, 2^21550060633 is an apocalyptic number.

It is an amenable number.

21550060633 is a deficient number, since it is larger than the sum of its proper divisors (1).

21550060633 is an equidigital number, since it uses as much as digits as its factorization.

21550060633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 21550060633 in words is "twenty-one billion, five hundred fifty million, sixty thousand, six hundred thirty-three".