18246861 has 12 divisors (see below), whose sum is σ = 26718588. Its totient is φ = 11997504.

The previous prime is 18246853. The next prime is 18246863. The reversal of 18246861 is 16864281.

It can be written as a sum of positive squares in 2 ways, for example, as 10989225 + 7257636 = 3315^2 + 2694^2 .

It is not a de Polignac number, because 18246861 - 2³ = 18246853 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18246863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13230 + ... + 14543.

It is an arithmetic number, because the mean of its divisors is an integer number (2226549).

Almost surely, 2^18246861 is an apocalyptic number.

It is an amenable number.

18246861 is a deficient number, since it is larger than the sum of its proper divisors (8471727).

18246861 is a wasteful number, since it uses less digits than its factorization.

18246861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27852 (or 27849 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18246861 is about 4271.6344646985. The cubic root of 18246861 is about 263.2667757158.

The spelling of 18246861 in words is "eighteen million, two hundred forty-six thousand, eight hundred sixty-one".