18348885 has 24 divisors (see below), whose sum is σ = 32258304. Its totient is φ = 9646560.

The previous prime is 18348881. The next prime is 18348887. The reversal of 18348885 is 58884381.

It is not a de Polignac number, because 18348885 - 2² = 18348881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18348885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324 + ... + 6066.

It is an arithmetic number, because the mean of its divisors is an integer number (1344096).

Almost surely, 2^18348885 is an apocalyptic number.

18348885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18348885 is a deficient number, since it is larger than the sum of its proper divisors (13909419).

18348885 is a wasteful number, since it uses less digits than its factorization.

18348885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825 (or 5822 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 18348885 is about 4283.5598513386. The cubic root of 18348885 is about 263.7565334590.

The spelling of 18348885 in words is "eighteen million, three hundred forty-eight thousand, eight hundred eighty-five".