20144091 has 16 divisors (see below), whose sum is σ = 29783808. Its totient is φ = 12007200.

The previous prime is 20144083. The next prime is 20144093. The reversal of 20144091 is 19044102.

It is not a de Polignac number, because 20144091 - 2³ = 20144083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20144093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991 + ... + 7016.

It is an arithmetic number, because the mean of its divisors is an integer number (1861488).

Almost surely, 2^20144091 is an apocalyptic number.

20144091 is a deficient number, since it is larger than the sum of its proper divisors (9639717).

20144091 is a wasteful number, since it uses less digits than its factorization.

20144091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10082.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20144091 is about 4488.2169065231. The cubic root of 20144091 is about 272.0920743288.

Adding to 20144091 its reverse (19044102), we get a palindrome (39188193).

It can be divided in two parts, 2014 and 4091, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 20144091 in words is "twenty million, one hundred forty-four thousand, ninety-one".