18248851 has 4 divisors (see below), whose sum is σ = 18257400. Its totient is φ = 18240304.

The previous prime is 18248849. The next prime is 18248891. The reversal of 18248851 is 15884281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18248851 - 2¹ = 18248849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18248851.

It is not an unprimeable number, because it can be changed into a prime (18248891) 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, 1935 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (4564350).

Almost surely, 2^18248851 is an apocalyptic number.

18248851 is a deficient number, since it is larger than the sum of its proper divisors (8549).

18248851 is an equidigital number, since it uses as much as digits as its factorization.

18248851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548.

The product of its digits is 20480, while the sum is 37.

The square root of 18248851 is about 4271.8673902639. The cubic root of 18248851 is about 263.2763459799.

The spelling of 18248851 in words is "eighteen million, two hundred forty-eight thousand, eight hundred fifty-one".