18141956 has 30 divisors (see below), whose sum is σ = 37057230. Its totient is φ = 7771008.

The previous prime is 18141947. The next prime is 18141971. The reversal of 18141956 is 65914181.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 2775556 = 3920^2 + 1666^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8660 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (1235241).

Almost surely, 2^18141956 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 18141956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18528615).

18141956 is an abundant number, since it is smaller than the sum of its proper divisors (18915274).

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

18141956 is an equidigital number, since it uses as much as digits as its factorization.

18141956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1898 counting only the distinct ones).

The product of its digits is 8640, while the sum is 35.

The square root of 18141956 is about 4259.3375071717. The cubic root of 18141956 is about 262.7612805876.

The spelling of 18141956 in words is "eighteen million, one hundred forty-one thousand, nine hundred fifty-six".