18681053 has 2 divisors, whose sum is σ = 18681054. Its totient is φ = 18681052.

The previous prime is 18681031. The next prime is 18681139. The reversal of 18681053 is 35018681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 1369 = 4322^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 18681053 - 2⁶ = 18680989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18681653) 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, 9340526 + 9340527.

It is an arithmetic number, because the mean of its divisors is an integer number (9340527).

Almost surely, 2^18681053 is an apocalyptic number.

It is an amenable number.

18681053 is a deficient number, since it is larger than the sum of its proper divisors (1).

18681053 is an equidigital number, since it uses as much as digits as its factorization.

18681053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18681053 is about 4322.1583728503. The cubic root of 18681053 is about 265.3386106975.

The spelling of 18681053 in words is "eighteen million, six hundred eighty-one thousand, fifty-three".