18815059 has 2 divisors, whose sum is σ = 18815060. Its totient is φ = 18815058.

The previous prime is 18815057. The next prime is 18815063. The reversal of 18815059 is 95051881.

It is a weak prime.

It is an emirp because it is prime and its reverse (95051881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18815059 - 2¹ = 18815057 is a prime.

Together with 18815057, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18815057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407529 + 9407530.

It is an arithmetic number, because the mean of its divisors is an integer number (9407530).

Almost surely, 2^18815059 is an apocalyptic number.

18815059 is a deficient number, since it is larger than the sum of its proper divisors (1).

18815059 is an equidigital number, since it uses as much as digits as its factorization.

18815059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 18815059 is about 4337.6328798090. The cubic root of 18815059 is about 265.9715564966.

The spelling of 18815059 in words is "eighteen million, eight hundred fifteen thousand, fifty-nine".