204152434440 has 32 divisors (see below), whose sum is σ = 612457303680. Its totient is φ = 54440649152.

The previous prime is 204152434433. The next prime is 204152434441. The reversal of 204152434440 is 44434251402.

It is a super-2 number, since 2×204152434440² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204152434441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850635024 + ... + 850635263.

It is an arithmetic number, because the mean of its divisors is an integer number (19139290740).

Almost surely, 2^204152434440 is an apocalyptic number.

204152434440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204152434440 is an abundant number, since it is smaller than the sum of its proper divisors (408304869240).

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

204152434440 is a wasteful number, since it uses less digits than its factorization.

204152434440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701270301 (or 1701270297 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 204152434440 its reverse (44434251402), we get a palindrome (248586685842).

The spelling of 204152434440 in words is "two hundred four billion, one hundred fifty-two million, four hundred thirty-four thousand, four hundred forty".