19427100217 has 24 divisors (see below), whose sum is σ = 23938467840. Its totient is φ = 15665569920.

The previous prime is 19427100109. The next prime is 19427100241. The reversal of 19427100217 is 71200172491.

It is a de Polignac number, because none of the positive numbers 2^k-19427100217 is a prime.

It is a super-2 number, since 2×19427100217² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19427100617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3094792 + ... + 3101062.

It is an arithmetic number, because the mean of its divisors is an integer number (997436160).

Almost surely, 2^19427100217 is an apocalyptic number.

19427100217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19427100217 is a deficient number, since it is larger than the sum of its proper divisors (4511367623).

19427100217 is a wasteful number, since it uses less digits than its factorization.

19427100217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021 (or 10014 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 19427100217 in words is "nineteen billion, four hundred twenty-seven million, one hundred thousand, two hundred seventeen".