18243485 has 16 divisors (see below), whose sum is σ = 24603264. Its totient is φ = 12885312.

The previous prime is 18243457. The next prime is 18243509. The reversal of 18243485 is 58434281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18243485 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4607 + ... + 7596.

It is an arithmetic number, because the mean of its divisors is an integer number (1537704).

Almost surely, 2^18243485 is an apocalyptic number.

It is an amenable number.

18243485 is a deficient number, since it is larger than the sum of its proper divisors (6359779).

18243485 is a wasteful number, since it uses less digits than its factorization.

18243485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12244.

The product of its digits is 30720, while the sum is 35.

The square root of 18243485 is about 4271.2392815201. The cubic root of 18243485 is about 263.2505383393.

The spelling of 18243485 in words is "eighteen million, two hundred forty-three thousand, four hundred eighty-five".