18051420 has 24 divisors (see below), whose sum is σ = 50544144. Its totient is φ = 4813696.

The previous prime is 18051413. The next prime is 18051457. The reversal of 18051420 is 2415081.

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, 150369 + ... + 150488.

It is an arithmetic number, because the mean of its divisors is an integer number (2106006).

Almost surely, 2^18051420 is an apocalyptic number.

18051420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18051420 is an abundant number, since it is smaller than the sum of its proper divisors (32492724).

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

18051420 is a wasteful number, since it uses less digits than its factorization.

18051420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300869 (or 300867 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18051420 is about 4248.6962706223. The cubic root of 18051420 is about 262.3234549870.

The spelling of 18051420 in words is "eighteen million, fifty-one thousand, four hundred twenty".