204420566100340 has 12 divisors (see below), whose sum is σ = 429283188810756. Its totient is φ = 81768226440128.

The previous prime is 204420566100329. The next prime is 204420566100349. The reversal of 204420566100340 is 43001665024402.

It can be written as a sum of positive squares in 2 ways, for example, as 21734579665296 + 182685986435044 = 4662036^2 + 13516138^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204420566100340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204420566100349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110514152489 + ... + 5110514152528.

It is an arithmetic number, because the mean of its divisors is an integer number (35773599067563).

Almost surely, 2^{204420566100340} is an apocalyptic number.

204420566100340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204420566100340 is an abundant number, since it is smaller than the sum of its proper divisors (224862622710416).

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

204420566100340 is a wasteful number, since it uses less digits than its factorization.

204420566100340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221028305026 (or 10221028305024 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 204420566100340 in words is "two hundred four trillion, four hundred twenty billion, five hundred sixty-six million, one hundred thousand, three hundred forty".