204263646340 has 48 divisors (see below), whose sum is σ = 466523915760. Its totient is φ = 74673676800.

The previous prime is 204263646337. The next prime is 204263646347. The reversal of 204263646340 is 43646362402.

It can be written as a sum of positive squares in 8 ways, for example, as 400560196 + 203863086144 = 20014^2 + 451512^2 .

It is a super-2 number, since 2×204263646340² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204263646293 and 204263646302.

It is not an unprimeable number, because it can be changed into a prime (204263646347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3862995 + ... + 3915514.

It is an arithmetic number, because the mean of its divisors is an integer number (9719248245).

Almost surely, 2^204263646340 is an apocalyptic number.

204263646340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204263646340 is an abundant number, since it is smaller than the sum of its proper divisors (262260269420).

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

204263646340 is a wasteful number, since it uses less digits than its factorization.

204263646340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778632 (or 7778630 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 40.

The spelling of 204263646340 in words is "two hundred four billion, two hundred sixty-three million, six hundred forty-six thousand, three hundred forty".