18844545 has 8 divisors (see below), whose sum is σ = 30151296. Its totient is φ = 10050416.

The previous prime is 18844537. The next prime is 18844549. The reversal of 18844545 is 54544881.

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 18844545 - 2³ = 18844537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18844549) 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, 628137 + ... + 628166.

It is an arithmetic number, because the mean of its divisors is an integer number (3768912).

Almost surely, 2^18844545 is an apocalyptic number.

18844545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18844545 is a deficient number, since it is larger than the sum of its proper divisors (11306751).

18844545 is a wasteful number, since it uses less digits than its factorization.

18844545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256311.

The product of its digits is 102400, while the sum is 39.

The square root of 18844545 is about 4341.0304076337. The cubic root of 18844545 is about 266.1104229957.

The spelling of 18844545 in words is "eighteen million, eight hundred forty-four thousand, five hundred forty-five".