18980573 has 2 divisors, whose sum is σ = 18980574. Its totient is φ = 18980572.

The previous prime is 18980561. The next prime is 18980579. The reversal of 18980573 is 37508981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17081689 + 1898884 = 4133^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 18980573 - 2⁴ = 18980557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18980573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18980579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9490286 + 9490287.

It is an arithmetic number, because the mean of its divisors is an integer number (9490287).

Almost surely, 2^18980573 is an apocalyptic number.

It is an amenable number.

18980573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18980573 is an equidigital number, since it uses as much as digits as its factorization.

18980573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 18980573 is about 4356.6699438906. The cubic root of 18980573 is about 266.7491881759.

The spelling of 18980573 in words is "eighteen million, nine hundred eighty thousand, five hundred seventy-three".