204240123240 has 32 divisors (see below), whose sum is σ = 612720370080. Its totient is φ = 54464032832.

The previous prime is 204240123209. The next prime is 204240123271. The reversal of 204240123240 is 42321042402.

It is an interprime number because it is at equal distance from previous prime (204240123209) and next prime (204240123271).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 204240123240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851000394 + ... + 851000633.

It is an arithmetic number, because the mean of its divisors is an integer number (19147511565).

Almost surely, 2^204240123240 is an apocalyptic number.

204240123240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204240123240 is an abundant number, since it is smaller than the sum of its proper divisors (408480246840).

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

204240123240 is a wasteful number, since it uses less digits than its factorization.

204240123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702001041 (or 1702001037 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 204240123240 its reverse (42321042402), we get a palindrome (246561165642).

The spelling of 204240123240 in words is "two hundred four billion, two hundred forty million, one hundred twenty-three thousand, two hundred forty".