18201001002011 has 4 divisors (see below), whose sum is σ = 18788130066624. Its totient is φ = 17613871937400.

The previous prime is 18201001001993. The next prime is 18201001002031. The reversal of 18201001002011 is 11020010010281.

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

It is a cyclic number.

It is not a de Polignac number, because 18201001002011 - 2⁶ = 18201001001947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18201001002031) 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, 293564532260 + ... + 293564532321.

It is an arithmetic number, because the mean of its divisors is an integer number (4697032516656).

Almost surely, 2^{18201001002011} is an apocalyptic number.

18201001002011 is a deficient number, since it is larger than the sum of its proper divisors (587129064613).

18201001002011 is an equidigital number, since it uses as much as digits as its factorization.

18201001002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587129064612.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 18201001002011 its reverse (11020010010281), we get a palindrome (29221011012292).

The spelling of 18201001002011 in words is "eighteen trillion, two hundred one billion, one million, two thousand, eleven".