18206949 has 8 divisors (see below), whose sum is σ = 25704000. Its totient is φ = 11423936.

The previous prime is 18206939. The next prime is 18206953. The reversal of 18206949 is 94960281.

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 18206949 - 2⁵ = 18206917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18206939) 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, 178449 + ... + 178550.

It is an arithmetic number, because the mean of its divisors is an integer number (3213000).

Almost surely, 2^18206949 is an apocalyptic number.

It is an amenable number.

18206949 is a deficient number, since it is larger than the sum of its proper divisors (7497051).

18206949 is a wasteful number, since it uses less digits than its factorization.

18206949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357019.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 18206949 is about 4266.9601591766. The cubic root of 18206949 is about 263.0746847031.

The spelling of 18206949 in words is "eighteen million, two hundred six thousand, nine hundred forty-nine".