18262157 has 6 divisors (see below), whose sum is σ = 18638478. Its totient is φ = 17887064.

The previous prime is 18262147. The next prime is 18262159. The reversal of 18262157 is 75126281.

It can be written as a sum of positive squares in only one way, i.e., 16883881 + 1378276 = 4109^2 + 1174^2 .

It is not a de Polignac number, because 18262157 - 2¹⁶ = 18196621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18262159) 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 5 ways as a sum of consecutive naturals, for example, 30818 + ... + 31404.

It is an arithmetic number, because the mean of its divisors is an integer number (3106413).

Almost surely, 2^18262157 is an apocalyptic number.

It is an amenable number.

18262157 is a deficient number, since it is larger than the sum of its proper divisors (376321).

18262157 is an frugal number, since it uses more digits than its factorization.

18262157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 640 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 18262157 is about 4273.4245050077. The cubic root of 18262157 is about 263.3403190299.

The spelling of 18262157 in words is "eighteen million, two hundred sixty-two thousand, one hundred fifty-seven".