18913361 has 8 divisors (see below), whose sum is σ = 19198848. Its totient is φ = 18630000.

The previous prime is 18913289. The next prime is 18913369. The reversal of 18913361 is 16331981.

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 18913361 - 2¹⁰ = 18912337 is a prime.

It is a deceptive number, since it divides R_18913360.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18913369) 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, 27026 + ... + 27716.

It is an arithmetic number, because the mean of its divisors is an integer number (2399856).

Almost surely, 2^18913361 is an apocalyptic number.

It is an amenable number.

18913361 is a deficient number, since it is larger than the sum of its proper divisors (285487).

18913361 is a wasteful number, since it uses less digits than its factorization.

18913361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063.

The product of its digits is 3888, while the sum is 32.

The square root of 18913361 is about 4348.9494133641. The cubic root of 18913361 is about 266.4339544432.

The spelling of 18913361 in words is "eighteen million, nine hundred thirteen thousand, three hundred sixty-one".