18549071 has 2 divisors, whose sum is σ = 18549072. Its totient is φ = 18549070.

The previous prime is 18549059. The next prime is 18549101. The reversal of 18549071 is 17094581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18549071 - 2⁶ = 18549007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18549371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274535 + 9274536.

It is an arithmetic number, because the mean of its divisors is an integer number (9274536).

Almost surely, 2^18549071 is an apocalyptic number.

18549071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18549071 is an equidigital number, since it uses as much as digits as its factorization.

18549071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18549071 is about 4306.8632437077. The cubic root of 18549071 is about 264.7122591763.

The spelling of 18549071 in words is "eighteen million, five hundred forty-nine thousand, seventy-one".