18904641 has 12 divisors (see below), whose sum is σ = 29321712. Its totient is φ = 10802568.

The previous prime is 18904583. The next prime is 18904679. The reversal of 18904641 is 14640981.

It is not a de Polignac number, because 18904641 - 2¹¹ = 18902593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18904681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64155 + ... + 64448.

It is an arithmetic number, because the mean of its divisors is an integer number (2443476).

Almost surely, 2^18904641 is an apocalyptic number.

It is an amenable number.

18904641 is a deficient number, since it is larger than the sum of its proper divisors (10417071).

18904641 is a wasteful number, since it uses less digits than its factorization.

18904641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128620 (or 128613 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18904641 is about 4347.9467568037. The cubic root of 18904641 is about 266.3930017145.

The spelling of 18904641 in words is "eighteen million, nine hundred four thousand, six hundred forty-one".