18457811 has 2 divisors, whose sum is σ = 18457812. Its totient is φ = 18457810.

The previous prime is 18457781. The next prime is 18457819. The reversal of 18457811 is 11875481.

It is a strong prime.

It is an emirp because it is prime and its reverse (11875481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18457811 - 2¹⁴ = 18441427 is a prime.

It is not a weakly prime, because it can be changed into another prime (18457819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9228905 + 9228906.

It is an arithmetic number, because the mean of its divisors is an integer number (9228906).

Almost surely, 2^18457811 is an apocalyptic number.

18457811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18457811 is an equidigital number, since it uses as much as digits as its factorization.

18457811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 18457811 is about 4296.2554626093. The cubic root of 18457811 is about 264.2774239704.

The spelling of 18457811 in words is "eighteen million, four hundred fifty-seven thousand, eight hundred eleven".