18201549901 has 8 divisors (see below), whose sum is σ = 18964295424. Its totient is φ = 17449779360.

The previous prime is 18201549887. The next prime is 18201549911. The reversal of 18201549901 is 10994510281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18201549901 - 2¹¹ = 18201547853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18201549911) 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, 2740360 + ... + 2746993.

It is an arithmetic number, because the mean of its divisors is an integer number (2370536928).

Almost surely, 2^18201549901 is an apocalyptic number.

It is an amenable number.

18201549901 is a deficient number, since it is larger than the sum of its proper divisors (762745523).

18201549901 is a wasteful number, since it uses less digits than its factorization.

18201549901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487491.

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 18201549901 in words is "eighteen billion, two hundred one million, five hundred forty-nine thousand, nine hundred one".