20440101 has 8 divisors (see below), whose sum is σ = 29731104. Its totient is φ = 12387920.

The previous prime is 20440039. The next prime is 20440109. The reversal of 20440101 is 10104402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20440101 - 2¹⁰ = 20439077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309666 + ... + 309731.

It is an arithmetic number, because the mean of its divisors is an integer number (3716388).

Almost surely, 2^20440101 is an apocalyptic number.

It is an amenable number.

20440101 is a deficient number, since it is larger than the sum of its proper divisors (9291003).

20440101 is a wasteful number, since it uses less digits than its factorization.

20440101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619411.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20440101 is about 4521.0729921115. The cubic root of 20440101 is about 273.4183632278.

Adding to 20440101 its reverse (10104402), we get a palindrome (30544503).

The spelling of 20440101 in words is "twenty million, four hundred forty thousand, one hundred one".