18621269608 has 16 divisors (see below), whose sum is σ = 34916468580. Its totient is φ = 9310211328.

The previous prime is 18621269593. The next prime is 18621269657. The reversal of 18621269608 is 80696212681.

It can be written as a sum of positive squares in 2 ways, for example, as 18375971364 + 245298244 = 135558^2 + 15662^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211866 + ... + 286582.

Almost surely, 2^18621269608 is an apocalyptic number.

It is an amenable number.

18621269608 is a deficient number, since it is larger than the sum of its proper divisors (16295198972).

18621269608 is a wasteful number, since it uses less digits than its factorization.

18621269608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105876 (or 105872 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 18621269608 in words is "eighteen billion, six hundred twenty-one million, two hundred sixty-nine thousand, six hundred eight".