18195840006 has 16 divisors (see below), whose sum is σ = 36395322624. Its totient is φ = 6064672904.

The previous prime is 18195839951. The next prime is 18195840007. The reversal of 18195840006 is 60004859181.

It is a self number, because there is not a number n which added to its sum of digits gives 18195840006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195840007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84546 + ... + 208661.

It is an arithmetic number, because the mean of its divisors is an integer number (2274707664).

Almost surely, 2^18195840006 is an apocalyptic number.

18195840006 is an abundant number, since it is smaller than the sum of its proper divisors (18199482618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18195840006 is a wasteful number, since it uses less digits than its factorization.

18195840006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303555.

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 18195840006 in words is "eighteen billion, one hundred ninety-five million, eight hundred forty thousand, six".