20408541 has 8 divisors (see below), whose sum is σ = 27354624. Its totient is φ = 13534080.

The previous prime is 20408533. The next prime is 20408543. The reversal of 20408541 is 14580402.

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

It is not a de Polignac number, because 20408541 - 2³ = 20408533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17236 + ... + 18381.

It is an arithmetic number, because the mean of its divisors is an integer number (3419328).

Almost surely, 2^20408541 is an apocalyptic number.

It is an amenable number.

20408541 is a deficient number, since it is larger than the sum of its proper divisors (6946083).

20408541 is a wasteful number, since it uses less digits than its factorization.

20408541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35811.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20408541 is about 4517.5813219022. The cubic root of 20408541 is about 273.2775692639.

Adding to 20408541 its reverse (14580402), we get a palindrome (34988943).

The spelling of 20408541 in words is "twenty million, four hundred eight thousand, five hundred forty-one".