18474861 has 16 divisors (see below), whose sum is σ = 25171200. Its totient is φ = 12050688.

The previous prime is 18474823. The next prime is 18474889. The reversal of 18474861 is 16847481.

It is not a de Polignac number, because 18474861 - 2¹⁴ = 18458477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474761) 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, 32185 + ... + 32753.

It is an arithmetic number, because the mean of its divisors is an integer number (1573200).

Almost surely, 2^18474861 is an apocalyptic number.

It is an amenable number.

18474861 is a deficient number, since it is larger than the sum of its proper divisors (6696339).

18474861 is a wasteful number, since it uses less digits than its factorization.

18474861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 43008, while the sum is 39.

The square root of 18474861 is about 4298.2392906864. The cubic root of 18474861 is about 264.3587724281.

The spelling of 18474861 in words is "eighteen million, four hundred seventy-four thousand, eight hundred sixty-one".