18414840 has 32 divisors (see below), whose sum is σ = 55244880. Its totient is φ = 4910592.

The previous prime is 18414839. The next prime is 18414853. The reversal of 18414840 is 4841481.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18414798 and 18414807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76609 + ... + 76848.

Almost surely, 2^18414840 is an apocalyptic number.

18414840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18414840 is an abundant number, since it is smaller than the sum of its proper divisors (36830040).

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

18414840 is a wasteful number, since it uses less digits than its factorization.

18414840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153471 (or 153467 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 18414840 is about 4291.2515656857. The cubic root of 18414840 is about 264.0721795292.

The spelling of 18414840 in words is "eighteen million, four hundred fourteen thousand, eight hundred forty".