18149985349 has 8 divisors (see below), whose sum is σ = 19332710208. Its totient is φ = 16980047040.

The previous prime is 18149985341. The next prime is 18149985379. The reversal of 18149985349 is 94358994181.

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 18149985349 - 2³ = 18149985341 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 (18149985341) 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, 3193707 + ... + 3199384.

It is an arithmetic number, because the mean of its divisors is an integer number (2416588776).

Almost surely, 2^18149985349 is an apocalyptic number.

It is an amenable number.

18149985349 is a deficient number, since it is larger than the sum of its proper divisors (1182724859).

18149985349 is a wasteful number, since it uses less digits than its factorization.

18149985349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393275.

The product of its digits is 11197440, while the sum is 61.

The spelling of 18149985349 in words is "eighteen billion, one hundred forty-nine million, nine hundred eighty-five thousand, three hundred forty-nine".