21450542083 has 2 divisors, whose sum is σ = 21450542084. Its totient is φ = 21450542082.

The previous prime is 21450542059. The next prime is 21450542117. The reversal of 21450542083 is 38024505412.

It is an a-pointer prime, because the next prime (21450542117) can be obtained adding 21450542083 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21450542083 - 2⁵ = 21450542051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21450542033) 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, 10725271041 + 10725271042.

It is an arithmetic number, because the mean of its divisors is an integer number (10725271042).

Almost surely, 2^21450542083 is an apocalyptic number.

21450542083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21450542083 is an equidigital number, since it uses as much as digits as its factorization.

21450542083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 21450542083 in words is "twenty-one billion, four hundred fifty million, five hundred forty-two thousand, eighty-three".