21599067733 has 2 divisors, whose sum is σ = 21599067734. Its totient is φ = 21599067732.

The previous prime is 21599067713. The next prime is 21599067781. The reversal of 21599067733 is 33776099512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17345680209 + 4253387524 = 131703^2 + 65218^2 .

It is a cyclic number.

It is not a de Polignac number, because 21599067733 - 2⁵ = 21599067701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21599067713) 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, 10799533866 + 10799533867.

It is an arithmetic number, because the mean of its divisors is an integer number (10799533867).

Almost surely, 2^21599067733 is an apocalyptic number.

It is an amenable number.

21599067733 is a deficient number, since it is larger than the sum of its proper divisors (1).

21599067733 is an equidigital number, since it uses as much as digits as its factorization.

21599067733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The spelling of 21599067733 in words is "twenty-one billion, five hundred ninety-nine million, sixty-seven thousand, seven hundred thirty-three".