18150420 has 24 divisors (see below), whose sum is σ = 50821344. Its totient is φ = 4840096.

The previous prime is 18150397. The next prime is 18150439. The reversal of 18150420 is 2405181.

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, 151194 + ... + 151313.

It is an arithmetic number, because the mean of its divisors is an integer number (2117556).

Almost surely, 2^18150420 is an apocalyptic number.

18150420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18150420 is an abundant number, since it is smaller than the sum of its proper divisors (32670924).

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

18150420 is a wasteful number, since it uses less digits than its factorization.

18150420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302519 (or 302517 counting only the distinct ones).

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

The square root of 18150420 is about 4260.3309730583. The cubic root of 18150420 is about 262.8021373674.

The spelling of 18150420 in words is "eighteen million, one hundred fifty thousand, four hundred twenty".