18141420 has 48 divisors (see below), whose sum is σ = 55415808. Its totient is φ = 4397760.

The previous prime is 18141419. The next prime is 18141439. The reversal of 18141420 is 2414181.

It is a happy number.

It is a super-2 number, since 2×18141420² = 658222239232800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 13084 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (1154496).

Almost surely, 2^18141420 is an apocalyptic number.

18141420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18141420 is an abundant number, since it is smaller than the sum of its proper divisors (37274388).

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

18141420 is a wasteful number, since it uses less digits than its factorization.

18141420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27510 (or 27508 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 18141420 is about 4259.2745861238. The cubic root of 18141420 is about 262.7586928212.

The spelling of 18141420 in words is "eighteen million, one hundred forty-one thousand, four hundred twenty".