19106488983409 has 3 divisors (see below), whose sum is σ = 19106493354507. Its totient is φ = 19106484612312.

The previous prime is 19106488983397. The next prime is 19106488983427. The reversal of 19106488983409 is 90438988460191.

The square root of 19106488983409 is 4371097.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 599904466225 + 18506584517184 = 774535^2 + 4301928^2 .

It is not a de Polignac number, because 19106488983409 - 2³⁵ = 19072129245041 is a prime.

It is a super-3 number, since 3×19106488983409³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19106488983499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2185549 + ... + 6556645.

It is an arithmetic number, because the mean of its divisors is an integer number (6368831118169).

Almost surely, 2^{19106488983409} is an apocalyptic number.

19106488983409 is the 4371097-th square number.

19106488983409 is the 2185549-th centered octagonal number.

It is an amenable number.

19106488983409 is a deficient number, since it is larger than the sum of its proper divisors (4371098).

19106488983409 is an frugal number, since it uses more digits than its factorization.

19106488983409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8742194 (or 4371097 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 70.

The spelling of 19106488983409 in words is "nineteen trillion, one hundred six billion, four hundred eighty-eight million, nine hundred eighty-three thousand, four hundred nine".