18490673 has 2 divisors, whose sum is σ = 18490674. Its totient is φ = 18490672.

The previous prime is 18490649. The next prime is 18490691. The reversal of 18490673 is 37609481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 2745649 = 3968^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 18490673 - 2¹⁶ = 18425137 is a prime.

It is not a weakly prime, because it can be changed into another prime (18490573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9245336 + 9245337.

It is an arithmetic number, because the mean of its divisors is an integer number (9245337).

Almost surely, 2^18490673 is an apocalyptic number.

It is an amenable number.

18490673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18490673 is an equidigital number, since it uses as much as digits as its factorization.

18490673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 18490673 is about 4300.0782551019. The cubic root of 18490673 is about 264.4341694583.

The spelling of 18490673 in words is "eighteen million, four hundred ninety thousand, six hundred seventy-three".