204355420412 has 48 divisors (see below), whose sum is σ = 423615714144. Its totient is φ = 85743504000.

The previous prime is 204355420403. The next prime is 204355420429. The reversal of 204355420412 is 214024553402.

It is a super-2 number, since 2×204355420412² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1407089 + ... + 1545512.

It is an arithmetic number, because the mean of its divisors is an integer number (8825327378).

Almost surely, 2^204355420412 is an apocalyptic number.

204355420412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

204355420412 is an abundant number, since it is smaller than the sum of its proper divisors (219260293732).

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

204355420412 is a wasteful number, since it uses less digits than its factorization.

204355420412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952651 (or 2952627 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 204355420412 its reverse (214024553402), we get a palindrome (418379973814).

It can be divided in two parts, 2043 and 55420412, that added together give a palindrome (55422455).

The spelling of 204355420412 in words is "two hundred four billion, three hundred fifty-five million, four hundred twenty thousand, four hundred twelve".