204023331021 has 32 divisors (see below), whose sum is σ = 290842306560. Its totient is φ = 126767004416.

The previous prime is 204023331019. The next prime is 204023331041. The reversal of 204023331021 is 120133320402.

It is a cyclic number.

It is not a de Polignac number, because 204023331021 - 2¹ = 204023331019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204023331041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17014390 + ... + 17026376.

It is an arithmetic number, because the mean of its divisors is an integer number (9088822080).

Almost surely, 2^204023331021 is an apocalyptic number.

It is an amenable number.

204023331021 is a deficient number, since it is larger than the sum of its proper divisors (86818975539).

204023331021 is a wasteful number, since it uses less digits than its factorization.

204023331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15233.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 204023331021 its reverse (120133320402), we get a palindrome (324156651423).

The spelling of 204023331021 in words is "two hundred four billion, twenty-three million, three hundred thirty-one thousand, twenty-one".