18192001002001 has 4 divisors (see below), whose sum is σ = 18205984094004. Its totient is φ = 18178017910000.

The previous prime is 18192001001903. The next prime is 18192001002011. The reversal of 18192001002001 is 10020010029181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419157835776 + 17772843166225 = 647424^2 + 4215785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18192001002001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18192001002011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6991544050 + ... + 6991546651.

It is an arithmetic number, because the mean of its divisors is an integer number (4551496023501).

Almost surely, 2^{18192001002001} is an apocalyptic number.

It is an amenable number.

18192001002001 is a deficient number, since it is larger than the sum of its proper divisors (13983092003).

18192001002001 is a wasteful number, since it uses less digits than its factorization.

18192001002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13983092002.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 18192001002001 in words is "eighteen trillion, one hundred ninety-two billion, one million, two thousand, one".