18471040 has 192 divisors, whose sum is σ = 55814400. Its totient is φ = 5806080.

The previous prime is 18471023. The next prime is 18471041. The reversal of 18471040 is 4017481.

It is a junction number, because it is equal to n+sod(n) for n = 18470996 and 18471014.

It is not an unprimeable number, because it can be changed into a prime (18471041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 595825 + ... + 595855.

It is an arithmetic number, because the mean of its divisors is an integer number (290700).

Almost surely, 2^18471040 is an apocalyptic number.

18471040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18471040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27907200).

18471040 is an abundant number, since it is smaller than the sum of its proper divisors (37343360).

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

18471040 is a wasteful number, since it uses less digits than its factorization.

18471040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18471040 is about 4297.7947833744. The cubic root of 18471040 is about 264.3405461382.

The spelling of 18471040 in words is "eighteen million, four hundred seventy-one thousand, forty".