18970559 has 2 divisors, whose sum is σ = 18970560. Its totient is φ = 18970558.

The previous prime is 18970547. The next prime is 18970579. The reversal of 18970559 is 95507981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18970559 - 2¹² = 18966463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18970519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9485279 + 9485280.

It is an arithmetic number, because the mean of its divisors is an integer number (9485280).

Almost surely, 2^18970559 is an apocalyptic number.

18970559 is a deficient number, since it is larger than the sum of its proper divisors (1).

18970559 is an equidigital number, since it uses as much as digits as its factorization.

18970559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 18970559 is about 4355.5205199838. The cubic root of 18970559 is about 266.7022683370.

The spelling of 18970559 in words is "eighteen million, nine hundred seventy thousand, five hundred fifty-nine".