18541449801 has 64 divisors (see below), whose sum is σ = 33813964800. Its totient is φ = 9803965248.

The previous prime is 18541449791. The next prime is 18541449809. The reversal of 18541449801 is 10894414581.

18541449801 is a `hidden beast` number, since 18 + 541 + 4 + 4 + 98 + 0 + 1 = 666.

It is not a de Polignac number, because 18541449801 - 2²¹ = 18539352649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18541449809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94375 + ... + 214451.

It is an arithmetic number, because the mean of its divisors is an integer number (528343200).

Almost surely, 2^18541449801 is an apocalyptic number.

It is an amenable number.

18541449801 is a deficient number, since it is larger than the sum of its proper divisors (15272514999).

18541449801 is a wasteful number, since it uses less digits than its factorization.

18541449801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120155 (or 120149 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 18541449801 in words is "eighteen billion, five hundred forty-one million, four hundred forty-nine thousand, eight hundred one".