18496840 has 16 divisors (see below), whose sum is σ = 41617980. Its totient is φ = 7398720.

The previous prime is 18496831. The next prime is 18496859. The reversal of 18496840 is 4869481.

It can be written as a sum of positive squares in 2 ways, for example, as 17690436 + 806404 = 4206^2 + 898^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 462421 = 18496840 / (1 + 8 + 4 + 9 + 6 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 18496793 and 18496802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231171 + ... + 231250.

Almost surely, 2^18496840 is an apocalyptic number.

18496840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18496840 is an abundant number, since it is smaller than the sum of its proper divisors (23121140).

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

18496840 is a wasteful number, since it uses less digits than its factorization.

18496840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462432 (or 462428 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 18496840 is about 4300.7952752950. The cubic root of 18496840 is about 264.4635641745.

The spelling of 18496840 in words is "eighteen million, four hundred ninety-six thousand, eight hundred forty".