18845481 has 16 divisors (see below), whose sum is σ = 25921280. Its totient is φ = 12171600.

The previous prime is 18845479. The next prime is 18845501. The reversal of 18845481 is 18454881.

It is not a de Polignac number, because 18845481 - 2¹ = 18845479 is a prime.

It is a super-2 number, since 2×18845481² = 710304308242722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18845381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17406 + ... + 18456.

It is an arithmetic number, because the mean of its divisors is an integer number (1620080).

Almost surely, 2^18845481 is an apocalyptic number.

It is an amenable number.

18845481 is a deficient number, since it is larger than the sum of its proper divisors (7075799).

18845481 is a wasteful number, since it uses less digits than its factorization.

18845481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 40960, while the sum is 39.

The square root of 18845481 is about 4341.1382148004. The cubic root of 18845481 is about 266.1148287841.

The spelling of 18845481 in words is "eighteen million, eight hundred forty-five thousand, four hundred eighty-one".