20444141 has 4 divisors (see below), whose sum is σ = 20581500. Its totient is φ = 20306784.

The previous prime is 20444113. The next prime is 20444147. The reversal of 20444141 is 14144402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5621641 + 14822500 = 2371^2 + 3850^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444141 - 2⁶ = 20444077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68456 + ... + 68753.

It is an arithmetic number, because the mean of its divisors is an integer number (5145375).

Almost surely, 2^20444141 is an apocalyptic number.

It is an amenable number.

20444141 is a deficient number, since it is larger than the sum of its proper divisors (137359).

20444141 is a wasteful number, since it uses less digits than its factorization.

20444141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137358.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 20444141 is about 4521.5197666271. The cubic root of 20444141 is about 273.4363758169.

Adding to 20444141 its reverse (14144402), we get a palindrome (34588543).

The spelling of 20444141 in words is "twenty million, four hundred forty-four thousand, one hundred forty-one".