20604143 has 8 divisors (see below), whose sum is σ = 23577888. Its totient is φ = 17637984.

The previous prime is 20604139. The next prime is 20604149. The reversal of 20604143 is 34140602.

It is a happy number.

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

It is not a de Polignac number, because 20604143 - 2² = 20604139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604149) 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, 6305 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (2947236).

Almost surely, 2^20604143 is an apocalyptic number.

20604143 is a deficient number, since it is larger than the sum of its proper divisors (2973745).

20604143 is a wasteful number, since it uses less digits than its factorization.

20604143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20604143 is about 4539.1786702001. The cubic root of 20604143 is about 274.1478547383.

Adding to 20604143 its reverse (34140602), we get a palindrome (54744745).

The spelling of 20604143 in words is "twenty million, six hundred four thousand, one hundred forty-three".