18248831 has 4 divisors (see below), whose sum is σ = 18637152. Its totient is φ = 17860512.

The previous prime is 18248809. The next prime is 18248833. The reversal of 18248831 is 13884281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18248831 - 2⁶ = 18248767 is a prime.

It is a super-2 number, since 2×18248831² = 666039665733122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18248791 and 18248800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18248833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194090 + ... + 194183.

It is an arithmetic number, because the mean of its divisors is an integer number (4659288).

Almost surely, 2^18248831 is an apocalyptic number.

18248831 is a deficient number, since it is larger than the sum of its proper divisors (388321).

18248831 is an equidigital number, since it uses as much as digits as its factorization.

18248831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388320.

The product of its digits is 12288, while the sum is 35.

The square root of 18248831 is about 4271.8650493666. The cubic root of 18248831 is about 263.2762497998.

The spelling of 18248831 in words is "eighteen million, two hundred forty-eight thousand, eight hundred thirty-one".