18484493549 has 16 divisors (see below), whose sum is σ = 19238968320. Its totient is φ = 17746812720.

The previous prime is 18484493543. The next prime is 18484493551. The reversal of 18484493549 is 94539448481.

It is a cyclic number.

It is not a de Polignac number, because 18484493549 - 2¹⁶ = 18484428013 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 (18484493543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759134 + ... + 783104.

It is an arithmetic number, because the mean of its divisors is an integer number (1202435520).

Almost surely, 2^18484493549 is an apocalyptic number.

It is an amenable number.

18484493549 is a deficient number, since it is larger than the sum of its proper divisors (754474771).

18484493549 is a wasteful number, since it uses less digits than its factorization.

18484493549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24320.

The product of its digits is 19906560, while the sum is 59.

The spelling of 18484493549 in words is "eighteen billion, four hundred eighty-four million, four hundred ninety-three thousand, five hundred forty-nine".