18840355 has 8 divisors (see below), whose sum is σ = 22748112. Its totient is φ = 14979168.

The previous prime is 18840331. The next prime is 18840359. The reversal of 18840355 is 55304881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18840355 - 2¹⁷ = 18709283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18840355.

It is not an unprimeable number, because it can be changed into a prime (18840359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10744 + ... + 12373.

It is an arithmetic number, because the mean of its divisors is an integer number (2843514).

Almost surely, 2^18840355 is an apocalyptic number.

18840355 is a deficient number, since it is larger than the sum of its proper divisors (3907757).

18840355 is a wasteful number, since it uses less digits than its factorization.

18840355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23285.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 18840355 is about 4340.5477764909. The cubic root of 18840355 is about 266.0906987144.

The spelling of 18840355 in words is "eighteen million, eight hundred forty thousand, three hundred fifty-five".