11320420549 has 2 divisors, whose sum is σ = 11320420550. Its totient is φ = 11320420548.

The previous prime is 11320420543. The next prime is 11320420583. The reversal of 11320420549 is 94502402311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7508222500 + 3812198049 = 86650^2 + 61743^2 .

It is a cyclic number.

It is not a de Polignac number, because 11320420549 - 2¹³ = 11320412357 is a prime.

It is a super-2 number, since 2×11320420549² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11320420549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11320420543) 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, 5660210274 + 5660210275.

It is an arithmetic number, because the mean of its divisors is an integer number (5660210275).

Almost surely, 2^11320420549 is an apocalyptic number.

It is an amenable number.

11320420549 is a deficient number, since it is larger than the sum of its proper divisors (1).

11320420549 is an equidigital number, since it uses as much as digits as its factorization.

11320420549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 11320420549 in words is "eleven billion, three hundred twenty million, four hundred twenty thousand, five hundred forty-nine".