18148420 has 48 divisors (see below), whose sum is σ = 40501440. Its totient is φ = 6811776.

The previous prime is 18148411. The next prime is 18148421. The reversal of 18148420 is 2484181.

It is not an unprimeable number, because it can be changed into a prime (18148421) 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, 61794 + ... + 62086.

It is an arithmetic number, because the mean of its divisors is an integer number (843780).

Almost surely, 2^18148420 is an apocalyptic number.

18148420 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 18148420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20250720).

18148420 is an abundant number, since it is smaller than the sum of its proper divisors (22353020).

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

18148420 is a wasteful number, since it uses less digits than its factorization.

18148420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 18148420 is about 4260.0962430443. The cubic root of 18148420 is about 262.7924842651.

The spelling of 18148420 in words is "eighteen million, one hundred forty-eight thousand, four hundred twenty".