18816073 has 2 divisors, whose sum is σ = 18816074. Its totient is φ = 18816072.

The previous prime is 18816029. The next prime is 18816097. The reversal of 18816073 is 37061881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17707264 + 1108809 = 4208^2 + 1053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18816073 is a prime.

It is not a weakly prime, because it can be changed into another prime (18816173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9408036 + 9408037.

It is an arithmetic number, because the mean of its divisors is an integer number (9408037).

Almost surely, 2^18816073 is an apocalyptic number.

It is an amenable number.

18816073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18816073 is an equidigital number, since it uses as much as digits as its factorization.

18816073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18816073 is about 4337.7497622615. The cubic root of 18816073 is about 265.9763344126.

It can be divided in two parts, 188 and 16073, that added together give a palindrome (16261).

The spelling of 18816073 in words is "eighteen million, eight hundred sixteen thousand, seventy-three".