20128141 has 4 divisors (see below), whose sum is σ = 21957984. Its totient is φ = 18298300.

The previous prime is 20128133. The next prime is 20128169. The reversal of 20128141 is 14182102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20128141 - 2³ = 20128133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20128741) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 914905 + ... + 914926.

It is an arithmetic number, because the mean of its divisors is an integer number (5489496).

Almost surely, 2^20128141 is an apocalyptic number.

It is an amenable number.

20128141 is a deficient number, since it is larger than the sum of its proper divisors (1829843).

20128141 is a wasteful number, since it uses less digits than its factorization.

20128141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829842.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 20128141 is about 4486.4396797461. The cubic root of 20128141 is about 272.0202416093.

It can be divided in two parts, 2012 and 8141, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 20128141 in words is "twenty million, one hundred twenty-eight thousand, one hundred forty-one".