20354105 has 4 divisors (see below), whose sum is σ = 24424932. Its totient is φ = 16283280.

The previous prime is 20354101. The next prime is 20354119. The reversal of 20354105 is 50145302.

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 8111104 + 12243001 = 2848^2 + 3499^2 .

It is not a de Polignac number, because 20354105 - 2² = 20354101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20354101) 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, 2035406 + ... + 2035415.

It is an arithmetic number, because the mean of its divisors is an integer number (6106233).

Almost surely, 2^20354105 is an apocalyptic number.

It is an amenable number.

20354105 is a deficient number, since it is larger than the sum of its proper divisors (4070827).

20354105 is an equidigital number, since it uses as much as digits as its factorization.

20354105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070826.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20354105 is about 4511.5523935781. The cubic root of 20354105 is about 273.0343804957.

Adding to 20354105 its reverse (50145302), we get a palindrome (70499407).

The spelling of 20354105 in words is "twenty million, three hundred fifty-four thousand, one hundred five".