18669473896 has 8 divisors (see below), whose sum is σ = 35005263570. Its totient is φ = 9334736944.

The previous prime is 18669473863. The next prime is 18669473897. The reversal of 18669473896 is 69837496681.

It can be written as a sum of positive squares in only one way, i.e., 18167265796 + 502208100 = 134786^2 + 22410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18669473897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1166842111 + ... + 1166842126.

Almost surely, 2^18669473896 is an apocalyptic number.

It is an amenable number.

18669473896 is a deficient number, since it is larger than the sum of its proper divisors (16335789674).

18669473896 is a wasteful number, since it uses less digits than its factorization.

18669473896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333684243 (or 2333684239 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 67.

The spelling of 18669473896 in words is "eighteen billion, six hundred sixty-nine million, four hundred seventy-three thousand, eight hundred ninety-six".