20444131 has 4 divisors (see below), whose sum is σ = 20557264. Its totient is φ = 20331000.

The previous prime is 20444113. The next prime is 20444147. The reversal of 20444131 is 13144402.

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

It is a cyclic number.

It is not a de Polignac number, because 20444131 - 2¹³ = 20435939 is a prime.

It is a super-2 number, since 2×20444131² = 835924984690322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20444099 and 20444108.

It is not an unprimeable number, because it can be changed into a prime (20444111) 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 3 ways as a sum of consecutive naturals, for example, 56295 + ... + 56656.

It is an arithmetic number, because the mean of its divisors is an integer number (5139316).

Almost surely, 2^20444131 is an apocalyptic number.

20444131 is the 2611-st hex number.

20444131 is a deficient number, since it is larger than the sum of its proper divisors (113133).

20444131 is a wasteful number, since it uses less digits than its factorization.

20444131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113132.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20444131 is about 4521.5186608041. The cubic root of 20444131 is about 273.4363312342.

Adding to 20444131 its reverse (13144402), we get a palindrome (33588533).

The spelling of 20444131 in words is "twenty million, four hundred forty-four thousand, one hundred thirty-one".