18224937 has 12 divisors (see below), whose sum is σ = 26366340. Its totient is φ = 12130848.

The previous prime is 18224929. The next prime is 18224939. The reversal of 18224937 is 73942281.

It can be written as a sum of positive squares in 2 ways, for example, as 15280281 + 2944656 = 3909^2 + 1716^2 .

It is not a de Polignac number, because 18224937 - 2³ = 18224929 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18224939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6739 + ... + 9047.

It is an arithmetic number, because the mean of its divisors is an integer number (2197195).

Almost surely, 2^18224937 is an apocalyptic number.

It is an amenable number.

18224937 is a deficient number, since it is larger than the sum of its proper divisors (8141403).

18224937 is a wasteful number, since it uses less digits than its factorization.

18224937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192 (or 3189 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 18224937 is about 4269.0674625731. The cubic root of 18224937 is about 263.1612932073.

It can be divided in two parts, 1822493 and 7, that added together give a square (1822500 = 1350²).

The spelling of 18224937 in words is "eighteen million, two hundred twenty-four thousand, nine hundred thirty-seven".