18838153 has 2 divisors, whose sum is σ = 18838154. Its totient is φ = 18838152.

The previous prime is 18838129. The next prime is 18838163. The reversal of 18838153 is 35183881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17280649 + 1557504 = 4157^2 + 1248^2 .

It is an emirp because it is prime and its reverse (35183881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18838153 - 2⁵ = 18838121 is a prime.

It is not a weakly prime, because it can be changed into another prime (18838163) 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 as a sum of consecutive naturals, namely, 9419076 + 9419077.

It is an arithmetic number, because the mean of its divisors is an integer number (9419077).

Almost surely, 2^18838153 is an apocalyptic number.

It is an amenable number.

18838153 is a deficient number, since it is larger than the sum of its proper divisors (1).

18838153 is an equidigital number, since it uses as much as digits as its factorization.

18838153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 18838153 is about 4340.2941144581. The cubic root of 18838153 is about 266.0803317026.

The spelling of 18838153 in words is "eighteen million, eight hundred thirty-eight thousand, one hundred fifty-three".