204023108644 has 24 divisors (see below), whose sum is σ = 378059172120. Its totient is φ = 96006721536.

The previous prime is 204023108623. The next prime is 204023108647. The reversal of 204023108644 is 446801320402.

It can be written as a sum of positive squares in 4 ways, for example, as 3643329600 + 200379779044 = 60360^2 + 447638^2 .

It is a super-2 number, since 2×204023108644² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (204023108647) 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, 1996752 + ... + 2096440.

It is an arithmetic number, because the mean of its divisors is an integer number (15752465505).

Almost surely, 2^204023108644 is an apocalyptic number.

It is an amenable number.

204023108644 is a deficient number, since it is larger than the sum of its proper divisors (174036063476).

204023108644 is a wasteful number, since it uses less digits than its factorization.

204023108644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129807 (or 129805 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 204023108644 in words is "two hundred four billion, twenty-three million, one hundred eight thousand, six hundred forty-four".