19198218855 has 8 divisors (see below), whose sum is σ = 30717150192. Its totient is φ = 10239050048.

The previous prime is 19198218829. The next prime is 19198218883. The reversal of 19198218855 is 55881289191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19198218855 - 2⁹ = 19198218343 is a prime.

It is a super-2 number, since 2×19198218855² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19198218795 and 19198218804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639940614 + ... + 639940643.

It is an arithmetic number, because the mean of its divisors is an integer number (3839643774).

Almost surely, 2^19198218855 is an apocalyptic number.

19198218855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19198218855 is a deficient number, since it is larger than the sum of its proper divisors (11518931337).

19198218855 is a wasteful number, since it uses less digits than its factorization.

19198218855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279881265.

The product of its digits is 2073600, while the sum is 57.

The spelling of 19198218855 in words is "nineteen billion, one hundred ninety-eight million, two hundred eighteen thousand, eight hundred fifty-five".