18006949 has 8 divisors (see below), whose sum is σ = 18413568. Its totient is φ = 17604720.

The previous prime is 18006943. The next prime is 18006971. The reversal of 18006949 is 94960081.

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 18006949 - 2⁵ = 18006917 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 (18006943) 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 7 ways as a sum of consecutive naturals, for example, 8019 + ... + 10015.

It is an arithmetic number, because the mean of its divisors is an integer number (2301696).

Almost surely, 2^18006949 is an apocalyptic number.

It is an amenable number.

18006949 is a deficient number, since it is larger than the sum of its proper divisors (406619).

18006949 is a wasteful number, since it uses less digits than its factorization.

18006949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 18006949 is about 4243.4595555985. The cubic root of 18006949 is about 262.1078601411.

The spelling of 18006949 in words is "eighteen million, six thousand, nine hundred forty-nine".