18025499 has 2 divisors, whose sum is σ = 18025500. Its totient is φ = 18025498.

The previous prime is 18025493. The next prime is 18025517. The reversal of 18025499 is 99452081.

It is a weak prime.

It is an emirp because it is prime and its reverse (99452081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18025499 - 2²⁰ = 16976923 is a prime.

It is a super-2 number, since 2×18025499² = 649837228398002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18025493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9012749 + 9012750.

It is an arithmetic number, because the mean of its divisors is an integer number (9012750).

Almost surely, 2^18025499 is an apocalyptic number.

18025499 is a deficient number, since it is larger than the sum of its proper divisors (1).

18025499 is an equidigital number, since it uses as much as digits as its factorization.

18025499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 18025499 is about 4245.6447095818. The cubic root of 18025499 is about 262.1978334098.

The spelling of 18025499 in words is "eighteen million, twenty-five thousand, four hundred ninety-nine".