17920379293 has 2 divisors, whose sum is σ = 17920379294. Its totient is φ = 17920379292.

The previous prime is 17920379287. The next prime is 17920379327. The reversal of 17920379293 is 39297302971.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12588166809 + 5332212484 = 112197^2 + 73022^2 .

It is an emirp because it is prime and its reverse (39297302971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17920379293 - 2³³ = 9330444701 is a prime.

It is a super-2 number, since 2×17920379293² (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 17920379293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17920379203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8960189646 + 8960189647.

It is an arithmetic number, because the mean of its divisors is an integer number (8960189647).

Almost surely, 2^17920379293 is an apocalyptic number.

It is an amenable number.

17920379293 is a deficient number, since it is larger than the sum of its proper divisors (1).

17920379293 is an equidigital number, since it uses as much as digits as its factorization.

17920379293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 52.

The spelling of 17920379293 in words is "seventeen billion, nine hundred twenty million, three hundred seventy-nine thousand, two hundred ninety-three".