18051349 has 4 divisors (see below), whose sum is σ = 19001440. Its totient is φ = 17101260.

The previous prime is 18051347. The next prime is 18051353. The reversal of 18051349 is 94315081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18051349 - 2¹ = 18051347 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 18051349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051347) 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 3 ways as a sum of consecutive naturals, for example, 475017 + ... + 475054.

It is an arithmetic number, because the mean of its divisors is an integer number (4750360).

Almost surely, 2^18051349 is an apocalyptic number.

18051349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18051349 is a deficient number, since it is larger than the sum of its proper divisors (950091).

18051349 is an equidigital number, since it uses as much as digits as its factorization.

18051349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950090.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18051349 is about 4248.6879151098. The cubic root of 18051349 is about 262.3231110622.

It can be divided in two parts, 180 and 51349, that added together give a square (51529 = 227²).

The spelling of 18051349 in words is "eighteen million, fifty-one thousand, three hundred forty-nine".