19018978359 has 16 divisors (see below), whose sum is σ = 26929536000. Its totient is φ = 11905681536.

The previous prime is 19018978351. The next prime is 19018978403. The reversal of 19018978359 is 95387981091.

It is not a de Polignac number, because 19018978359 - 2³ = 19018978351 is a prime.

It is a super-2 number, since 2×19018978359² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19018978351) 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 in 15 ways as a sum of consecutive naturals, for example, 1469959 + ... + 1482840.

It is an arithmetic number, because the mean of its divisors is an integer number (1683096000).

Almost surely, 2^19018978359 is an apocalyptic number.

19018978359 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19018978359 is a deficient number, since it is larger than the sum of its proper divisors (7910557641).

19018978359 is a wasteful number, since it uses less digits than its factorization.

19018978359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952934.

The product of its (nonzero) digits is 4898880, while the sum is 60.

The spelling of 19018978359 in words is "nineteen billion, eighteen million, nine hundred seventy-eight thousand, three hundred fifty-nine".