204015345100 has 72 divisors (see below), whose sum is σ = 523404937440. Its totient is φ = 67536107520.

The previous prime is 204015345089. The next prime is 204015345103. The reversal of 204015345100 is 1543510402.

It is a happy number.

It is a super-2 number, since 2×204015345100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (204015345103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5004709 + ... + 5045308.

It is an arithmetic number, because the mean of its divisors is an integer number (7269513020).

Almost surely, 2^204015345100 is an apocalyptic number.

204015345100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204015345100 is an abundant number, since it is smaller than the sum of its proper divisors (319389592340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204015345100 is a wasteful number, since it uses less digits than its factorization.

204015345100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050067 (or 10050060 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 204015345100 its reverse (1543510402), we get a palindrome (205558855502).

The spelling of 204015345100 in words is "two hundred four billion, fifteen million, three hundred forty-five thousand, one hundred".