19670904009 has 9 divisors (see below), whose sum is σ = 28414135789. Its totient is φ = 13113655500.

The previous prime is 19670904007. The next prime is 19670904013. The reversal of 19670904009 is 90040907691.

The square root of 19670904009 is 140253.

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

19670904009 is a `hidden beast` number, since 1 + 96 + 70 + 90 + 400 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 19670904009 - 2¹ = 19670904007 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19670904007) 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, 397384 + ... + 444134.

Almost surely, 2^19670904009 is an apocalyptic number.

19670904009 is the 140253-rd square number.

19670904009 is the 70127-th centered octagonal number.

It is an amenable number.

19670904009 is a deficient number, since it is larger than the sum of its proper divisors (8743231780).

19670904009 is an frugal number, since it uses more digits than its factorization.

19670904009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93508 (or 46754 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 19670904009 in words is "nineteen billion, six hundred seventy million, nine hundred four thousand, nine".