18955337 has 2 divisors, whose sum is σ = 18955338. Its totient is φ = 18955336.

The previous prime is 18955327. The next prime is 18955351. The reversal of 18955337 is 73355981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9616201 + 9339136 = 3101^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 18955337 - 2⁶ = 18955273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18955294 and 18955303.

It is not a weakly prime, because it can be changed into another prime (18955327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477668 + 9477669.

It is an arithmetic number, because the mean of its divisors is an integer number (9477669).

Almost surely, 2^18955337 is an apocalyptic number.

It is an amenable number.

18955337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18955337 is an equidigital number, since it uses as much as digits as its factorization.

18955337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 18955337 is about 4353.7727317810. The cubic root of 18955337 is about 266.6309151724.

The spelling of 18955337 in words is "eighteen million, nine hundred fifty-five thousand, three hundred thirty-seven".