19985279359 has 2 divisors, whose sum is σ = 19985279360. Its totient is φ = 19985279358.

The previous prime is 19985279351. The next prime is 19985279467. The reversal of 19985279359 is 95397258991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19985279359 - 2³ = 19985279351 is a prime.

It is a super-2 number, since 2×19985279359² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19985279294 and 19985279303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19985279351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9992639679 + 9992639680.

It is an arithmetic number, because the mean of its divisors is an integer number (9992639680).

Almost surely, 2^19985279359 is an apocalyptic number.

19985279359 is a deficient number, since it is larger than the sum of its proper divisors (1).

19985279359 is an equidigital number, since it uses as much as digits as its factorization.

19985279359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55112400, while the sum is 67.

The spelling of 19985279359 in words is "nineteen billion, nine hundred eighty-five million, two hundred seventy-nine thousand, three hundred fifty-nine".