18726073 has 2 divisors, whose sum is σ = 18726074. Its totient is φ = 18726072.

The previous prime is 18726067. The next prime is 18726101. The reversal of 18726073 is 37062781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14047504 + 4678569 = 3748^2 + 2163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18726073 is a prime.

It is equal to p_1194667 and since 18726073 and 1194667 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18726173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9363036 + 9363037.

It is an arithmetic number, because the mean of its divisors is an integer number (9363037).

Almost surely, 2^18726073 is an apocalyptic number.

It is an amenable number.

18726073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18726073 is an equidigital number, since it uses as much as digits as its factorization.

18726073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 18726073 is about 4327.3632849577. The cubic root of 18726073 is about 265.5515887188.

The spelling of 18726073 in words is "eighteen million, seven hundred twenty-six thousand, seventy-three".