20449101 has 4 divisors (see below), whose sum is σ = 27265472. Its totient is φ = 13632732.

The previous prime is 20449097. The next prime is 20449103. The reversal of 20449101 is 10194402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20449101 - 2² = 20449097 is a prime.

It is a super-3 number, since 3×20449101³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20449103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3408181 + ... + 3408186.

It is an arithmetic number, because the mean of its divisors is an integer number (6816368).

Almost surely, 2^20449101 is an apocalyptic number.

It is an amenable number.

20449101 is a deficient number, since it is larger than the sum of its proper divisors (6816371).

20449101 is an equidigital number, since it uses as much as digits as its factorization.

20449101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6816370.

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

The square root of 20449101 is about 4522.0682215110. The cubic root of 20449101 is about 273.4584870379.

The spelling of 20449101 in words is "twenty million, four hundred forty-nine thousand, one hundred one".