18412156 has 48 divisors (see below), whose sum is σ = 39868416. Its totient is φ = 7259904.

The previous prime is 18412153. The next prime is 18412169. The reversal of 18412156 is 65121481.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18412151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21961 + ... + 22783.

It is an arithmetic number, because the mean of its divisors is an integer number (830592).

Almost surely, 2^18412156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18412156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19934208).

18412156 is an abundant number, since it is smaller than the sum of its proper divisors (21456260).

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

18412156 is a wasteful number, since it uses less digits than its factorization.

18412156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 896 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 18412156 is about 4290.9388250125. The cubic root of 18412156 is about 264.0593492219.

The spelling of 18412156 in words is "eighteen million, four hundred twelve thousand, one hundred fifty-six".