18925005 has 24 divisors (see below), whose sum is σ = 33286176. Its totient is φ = 9174880.

The previous prime is 18924949. The next prime is 18925037. The reversal of 18925005 is 50052981.

It is not a de Polignac number, because 18925005 - 2⁷ = 18924877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3399 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (1386924).

Almost surely, 2^18925005 is an apocalyptic number.

18925005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18925005 is a deficient number, since it is larger than the sum of its proper divisors (14361171).

18925005 is a wasteful number, since it uses less digits than its factorization.

18925005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10457 (or 10446 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 18925005 is about 4350.2879215059. The cubic root of 18925005 is about 266.4886198642.

Adding to 18925005 its reverse (50052981), we get a palindrome (68977986).

The spelling of 18925005 in words is "eighteen million, nine hundred twenty-five thousand, five".