21048029593 has 2 divisors, whose sum is σ = 21048029594. Its totient is φ = 21048029592.

The previous prime is 21048029581. The next prime is 21048029617. The reversal of 21048029593 is 39592084012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13007858704 + 8040170889 = 114052^2 + 89667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21048029593 is a prime.

It is not a weakly prime, because it can be changed into another prime (21048029573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10524014796 + 10524014797.

It is an arithmetic number, because the mean of its divisors is an integer number (10524014797).

Almost surely, 2^21048029593 is an apocalyptic number.

It is an amenable number.

21048029593 is a deficient number, since it is larger than the sum of its proper divisors (1).

21048029593 is an equidigital number, since it uses as much as digits as its factorization.

21048029593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 21048029593 in words is "twenty-one billion, forty-eight million, twenty-nine thousand, five hundred ninety-three".