18845019 has 12 divisors (see below), whose sum is σ = 27260376. Its totient is φ = 12544992.

The previous prime is 18845011. The next prime is 18845059. The reversal of 18845019 is 91054881.

It is not a de Polignac number, because 18845019 - 2³ = 18845011 is a prime.

It is a super-2 number, since 2×18845019² = 710269482220722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18845011) 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, 8284 + ... + 10310.

It is an arithmetic number, because the mean of its divisors is an integer number (2271698).

Almost surely, 2^18845019 is an apocalyptic number.

18845019 is a deficient number, since it is larger than the sum of its proper divisors (8415357).

18845019 is a wasteful number, since it uses less digits than its factorization.

18845019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066 (or 3063 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18845019 is about 4341.0850026232. The cubic root of 18845019 is about 266.1126541503.

It can be divided in two parts, 1884 and 5019, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 18845019 in words is "eighteen million, eight hundred forty-five thousand, nineteen".