18825916 has 12 divisors (see below), whose sum is σ = 33711832. Its totient is φ = 9193968.

The previous prime is 18825907. The next prime is 18825923. The reversal of 18825916 is 61952881.

It is a super-2 number, since 2×18825916² = 708830226478112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54555 + ... + 54898.

Almost surely, 2^18825916 is an apocalyptic number.

It is an amenable number.

18825916 is a deficient number, since it is larger than the sum of its proper divisors (14885916).

18825916 is a wasteful number, since it uses less digits than its factorization.

18825916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109500 (or 109498 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 18825916 is about 4338.8841883600. The cubic root of 18825916 is about 266.0227052057.

The spelling of 18825916 in words is "eighteen million, eight hundred twenty-five thousand, nine hundred sixteen".