20441145 has 16 divisors (see below), whose sum is σ = 32824512. Its totient is φ = 10862400.

The previous prime is 20441137. The next prime is 20441147. The reversal of 20441145 is 54114402.

It is a happy number.

It is not a de Polignac number, because 20441145 - 2³ = 20441137 is a prime.

It is a super-2 number, since 2×20441145² = 835680817822050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20441147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2070 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (2051532).

Almost surely, 2^20441145 is an apocalyptic number.

It is an amenable number.

20441145 is a deficient number, since it is larger than the sum of its proper divisors (12383367).

20441145 is a wasteful number, since it uses less digits than its factorization.

20441145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20441145 is about 4521.1884499543. The cubic root of 20441145 is about 273.4230181936.

Adding to 20441145 its reverse (54114402), we get a palindrome (74555547).

The spelling of 20441145 in words is "twenty million, four hundred forty-one thousand, one hundred forty-five".