18341389 has 12 divisors (see below), whose sum is σ = 20396160. Its totient is φ = 16357160.

The previous prime is 18341383. The next prime is 18341399. The reversal of 18341389 is 98314381.

It is not a de Polignac number, because 18341389 - 2⁷ = 18341261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18341383) 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, 38052 + ... + 38530.

It is an arithmetic number, because the mean of its divisors is an integer number (1699680).

Almost surely, 2^18341389 is an apocalyptic number.

It is an amenable number.

18341389 is a deficient number, since it is larger than the sum of its proper divisors (2054771).

18341389 is an equidigital number, since it uses as much as digits as its factorization.

18341389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 549 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 18341389 is about 4282.6847887744. The cubic root of 18341389 is about 263.7206114167.

It can be divided in two parts, 1834 and 1389, that added together give a palindrome (3223).

The spelling of 18341389 in words is "eighteen million, three hundred forty-one thousand, three hundred eighty-nine".