20354401 has 4 divisors (see below), whose sum is σ = 20394900. Its totient is φ = 20313904.

The previous prime is 20354393. The next prime is 20354413. The reversal of 20354401 is 10445302.

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 9759376 + 10595025 = 3124^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 20354401 - 2³ = 20354393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20354441) 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, 19486 + ... + 20503.

It is an arithmetic number, because the mean of its divisors is an integer number (5098725).

Almost surely, 2^20354401 is an apocalyptic number.

It is an amenable number.

20354401 is a deficient number, since it is larger than the sum of its proper divisors (40499).

20354401 is an equidigital number, since it uses as much as digits as its factorization.

20354401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40498.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20354401 is about 4511.5851981316. The cubic root of 20354401 is about 273.0357040253.

Adding to 20354401 its reverse (10445302), we get a palindrome (30799703).

Subtracting from 20354401 its reverse (10445302), we obtain a palindrome (9909099).

The spelling of 20354401 in words is "twenty million, three hundred fifty-four thousand, four hundred one".