204415540535021 has 8 divisors (see below), whose sum is σ = 207705956529504. Its totient is φ = 201149957869200.

The previous prime is 204415540535009. The next prime is 204415540535057. The reversal of 204415540535021 is 120535045514402.

It is a happy number.

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 204415540535021 - 2⁶ = 204415540534957 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204415540535021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204415540535821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6208315571 + ... + 6208348496.

It is an arithmetic number, because the mean of its divisors is an integer number (25963244566188).

Almost surely, 2^{204415540535021} is an apocalyptic number.

It is an amenable number.

204415540535021 is a deficient number, since it is larger than the sum of its proper divisors (3290415994483).

204415540535021 is a wasteful number, since it uses less digits than its factorization.

204415540535021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12416664331.

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 204415540535021 in words is "two hundred four trillion, four hundred fifteen billion, five hundred forty million, five hundred thirty-five thousand, twenty-one".