20159142 has 8 divisors (see below), whose sum is σ = 40318296. Its totient is φ = 6719712.

The previous prime is 20159137. The next prime is 20159177. The reversal of 20159142 is 24195102.

It is a sphenic number, since it is the product of 3 distinct primes.

20159142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1679923 + ... + 1679934.

It is an arithmetic number, because the mean of its divisors is an integer number (5039787).

Almost surely, 2^20159142 is an apocalyptic number.

20159142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20159142 is a wasteful number, since it uses less digits than its factorization.

20159142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359862.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20159142 is about 4489.8933172181. The cubic root of 20159142 is about 272.1598235311.

It can be divided in two parts, 20159 and 142, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 20159142 in words is "twenty million, one hundred fifty-nine thousand, one hundred forty-two".