18248437 has 4 divisors (see below), whose sum is σ = 18741676. Its totient is φ = 17755200.

The previous prime is 18248423. The next prime is 18248441. The reversal of 18248437 is 73484281.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7789681 + 10458756 = 2791^2 + 3234^2 .

It is a cyclic number.

It is not a de Polignac number, because 18248437 - 2⁷ = 18248309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 493201 = 18248437 / (1 + 8 + 2 + 4 + 8 + 4 + 3 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18248396 and 18248405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18248137) 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, 246564 + ... + 246637.

It is an arithmetic number, because the mean of its divisors is an integer number (4685419).

Almost surely, 2^18248437 is an apocalyptic number.

It is an amenable number.

18248437 is a deficient number, since it is larger than the sum of its proper divisors (493239).

18248437 is an equidigital number, since it uses as much as digits as its factorization.

18248437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493238.

The product of its digits is 43008, while the sum is 37.

The square root of 18248437 is about 4271.8189334287. The cubic root of 18248437 is about 263.2743550376.

The spelling of 18248437 in words is "eighteen million, two hundred forty-eight thousand, four hundred thirty-seven".