18471404 has 12 divisors (see below), whose sum is σ = 36942864. Its totient is φ = 7916304.

The previous prime is 18471403. The next prime is 18471407. The reversal of 18471404 is 40417481.

18471404 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18471403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329819 + ... + 329874.

It is an arithmetic number, because the mean of its divisors is an integer number (3078572).

Almost surely, 2^18471404 is an apocalyptic number.

18471404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18471404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18471404 is a wasteful number, since it uses less digits than its factorization.

18471404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659704 (or 659702 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 18471404 is about 4297.8371304646. The cubic root of 18471404 is about 264.3422825379.

Adding to 18471404 its reverse (40417481), we get a palindrome (58888885).

The spelling of 18471404 in words is "eighteen million, four hundred seventy-one thousand, four hundred four".