20041409 has 8 divisors (see below), whose sum is σ = 21156000. Its totient is φ = 18932832.

The previous prime is 20041403. The next prime is 20041423. The reversal of 20041409 is 90414002.

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 20041409 - 2²⁰ = 18992833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20041403) 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, 6482 + ... + 9060.

It is an arithmetic number, because the mean of its divisors is an integer number (2644500).

Almost surely, 2^20041409 is an apocalyptic number.

It is an amenable number.

20041409 is a deficient number, since it is larger than the sum of its proper divisors (1114591).

20041409 is a wasteful number, since it uses less digits than its factorization.

20041409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20041409 is about 4476.7632280477. The cubic root of 20041409 is about 271.6289680502.

It can be divided in two parts, 20041 and 409, that multiplied together give a square (8196769 = 2863²).

The spelling of 20041409 in words is "twenty million, forty-one thousand, four hundred nine".