18826249 has 8 divisors (see below), whose sum is σ = 20973960. Its totient is φ = 16778496.

The previous prime is 18826243. The next prime is 18826261. The reversal of 18826249 is 94262881.

It can be written as a sum of positive squares in 4 ways, for example, as 60025 + 18766224 = 245^2 + 4332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18826249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18826243) 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, 24592 + ... + 25345.

It is an arithmetic number, because the mean of its divisors is an integer number (2621745).

Almost surely, 2^18826249 is an apocalyptic number.

It is an amenable number.

18826249 is a deficient number, since it is larger than the sum of its proper divisors (2147711).

18826249 is a wasteful number, since it uses less digits than its factorization.

18826249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49979.

The product of its digits is 55296, while the sum is 40.

The square root of 18826249 is about 4338.9225621115. The cubic root of 18826249 is about 266.0242737002.

The spelling of 18826249 in words is "eighteen million, eight hundred twenty-six thousand, two hundred forty-nine".