18525571 has 2 divisors, whose sum is σ = 18525572. Its totient is φ = 18525570.

The previous prime is 18525553. The next prime is 18525581. The reversal of 18525571 is 17552581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18525571 - 2⁵ = 18525539 is a prime.

It is not a weakly prime, because it can be changed into another prime (18525581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9262785 + 9262786.

It is an arithmetic number, because the mean of its divisors is an integer number (9262786).

Almost surely, 2^18525571 is an apocalyptic number.

18525571 is a deficient number, since it is larger than the sum of its proper divisors (1).

18525571 is an equidigital number, since it uses as much as digits as its factorization.

18525571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 34.

The square root of 18525571 is about 4304.1341754179. The cubic root of 18525571 is about 264.6004230817.

The spelling of 18525571 in words is "eighteen million, five hundred twenty-five thousand, five hundred seventy-one".