18668907 has 32 divisors (see below), whose sum is σ = 29678400. Its totient is φ = 11556864.

The previous prime is 18668861. The next prime is 18668921. The reversal of 18668907 is 70986681.

It is a happy number.

It is not a de Polignac number, because 18668907 - 2¹⁴ = 18652523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18668207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40623 + ... + 41079.

It is an arithmetic number, because the mean of its divisors is an integer number (927450).

Almost surely, 2^18668907 is an apocalyptic number.

18668907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18668907 is a deficient number, since it is larger than the sum of its proper divisors (11009493).

18668907 is a wasteful number, since it uses less digits than its factorization.

18668907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 18668907 is about 4320.7530593636. The cubic root of 18668907 is about 265.2810925001.

The spelling of 18668907 in words is "eighteen million, six hundred sixty-eight thousand, nine hundred seven".