18418441 has 2 divisors, whose sum is σ = 18418442. Its totient is φ = 18418440.

The previous prime is 18418427. The next prime is 18418453. The reversal of 18418441 is 14481481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16168441 + 2250000 = 4021^2 + 1500^2 .

It is a cyclic number.

It is not a de Polignac number, because 18418441 - 2⁵ = 18418409 is a prime.

It is not a weakly prime, because it can be changed into another prime (18428441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209220 + 9209221.

It is an arithmetic number, because the mean of its divisors is an integer number (9209221).

Almost surely, 2^18418441 is an apocalyptic number.

It is an amenable number.

18418441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18418441 is an equidigital number, since it uses as much as digits as its factorization.

18418441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4096, while the sum is 31.

The square root of 18418441 is about 4291.6711197388. The cubic root of 18418441 is about 264.0893914072.

The spelling of 18418441 in words is "eighteen million, four hundred eighteen thousand, four hundred forty-one".