19183081009 has 9 divisors (see below), whose sum is σ = 19645673259. Its totient is φ = 18731145720.

The previous prime is 19183081007. The next prime is 19183081031. The reversal of 19183081009 is 90018038191.

It is a happy number.

The square root of 19183081009 is 138503.

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

It can be written as a sum of positive squares in only one way, i.e., 14797992609 + 4385088400 = 121647^2 + 66220^2 .

It is not a de Polignac number, because 19183081009 - 2¹ = 19183081007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19183081007) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5954019 + ... + 5957239.

Almost surely, 2^19183081009 is an apocalyptic number.

19183081009 is the 138503-rd square number.

19183081009 is the 69252-nd centered octagonal number.

It is an amenable number.

19183081009 is a deficient number, since it is larger than the sum of its proper divisors (462592250).

19183081009 is an frugal number, since it uses more digits than its factorization.

19183081009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528 (or 3264 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 40.

The spelling of 19183081009 in words is "nineteen billion, one hundred eighty-three million, eighty-one thousand, nine".