204040120310420 has 48 divisors (see below), whose sum is σ = 453901512229200. Its totient is φ = 76779158544384.

The previous prime is 204040120310401. The next prime is 204040120310489. The reversal of 204040120310420 is 24013021040402.

It can be written as a sum of positive squares in 8 ways, for example, as 6150459520144 + 197889660790276 = 2480012^2 + 14067326^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139684745 + ... + 141137904.

It is an arithmetic number, because the mean of its divisors is an integer number (9456281504775).

Almost surely, 2^{204040120310420} is an apocalyptic number.

204040120310420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204040120310420 is an abundant number, since it is smaller than the sum of its proper divisors (249861391918780).

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

204040120310420 is a wasteful number, since it uses less digits than its factorization.

204040120310420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280824812 (or 280824810 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 204040120310420 its reverse (24013021040402), we get a palindrome (228053141350822).

The spelling of 204040120310420 in words is "two hundred four trillion, forty billion, one hundred twenty million, three hundred ten thousand, four hundred twenty".