204002420202 has 72 divisors (see below), whose sum is σ = 514603008036. Its totient is φ = 58237248384.

The previous prime is 204002420191. The next prime is 204002420203. The reversal of 204002420202 is 202024200402.

204002420202 is a `hidden beast` number, since 2 + 0 + 40 + 0 + 2 + 420 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 183544553241 + 20457866961 = 428421^2 + 143031^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (204002420203) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 955288 + ... + 1149164.

Almost surely, 2^204002420202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204002420202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257301504018).

204002420202 is an abundant number, since it is smaller than the sum of its proper divisors (310600587834).

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

204002420202 is a wasteful number, since it uses less digits than its factorization.

204002420202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195092 (or 195082 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 204002420202 its reverse (202024200402), we get a palindrome (406026620604).

The spelling of 204002420202 in words is "two hundred four billion, two million, four hundred twenty thousand, two hundred two".