18690416 has 10 divisors (see below), whose sum is σ = 36212712. Its totient is φ = 9345200.

The previous prime is 18690407. The next prime is 18690431. The reversal of 18690416 is 61409681.

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 as a sum of consecutive naturals, namely, 584060 + ... + 584091.

Almost surely, 2^18690416 is an apocalyptic number.

18690416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18690416 is a deficient number, since it is larger than the sum of its proper divisors (17522296).

18690416 is a wasteful number, since it uses less digits than its factorization.

18690416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168159 (or 1168153 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 18690416 is about 4323.2413765600. The cubic root of 18690416 is about 265.3829327970.

The spelling of 18690416 in words is "eighteen million, six hundred ninety thousand, four hundred sixteen".