204243154540 has 12 divisors (see below), whose sum is σ = 428910624576. Its totient is φ = 81697261808.

The previous prime is 204243154523. The next prime is 204243154541. The reversal of 204243154540 is 45451342402.

It is a super-2 number, since 2×204243154540² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204243154496 and 204243154505.

It is not an unprimeable number, because it can be changed into a prime (204243154541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5106078844 + ... + 5106078883.

It is an arithmetic number, because the mean of its divisors is an integer number (35742552048).

Almost surely, 2^204243154540 is an apocalyptic number.

204243154540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204243154540 is an abundant number, since it is smaller than the sum of its proper divisors (224667470036).

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

204243154540 is a wasteful number, since it uses less digits than its factorization.

204243154540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212157736 (or 10212157734 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 204243154540 its reverse (45451342402), we get a palindrome (249694496942).

The spelling of 204243154540 in words is "two hundred four billion, two hundred forty-three million, one hundred fifty-four thousand, five hundred forty".