204202312220 has 48 divisors (see below), whose sum is σ = 432154396800. Its totient is φ = 81049167360.

The previous prime is 204202312219. The next prime is 204202312243. The reversal of 204202312220 is 22213202402.

It is a super-2 number, since 2×204202312220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 204202312192 and 204202312201.

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, 1267166 + ... + 1419194.

It is an arithmetic number, because the mean of its divisors is an integer number (9003216600).

Almost surely, 2^204202312220 is an apocalyptic number.

204202312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204202312220 is an abundant number, since it is smaller than the sum of its proper divisors (227952084580).

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

204202312220 is a wasteful number, since it uses less digits than its factorization.

204202312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152558 (or 152556 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 204202312220 its reverse (22213202402), we get a palindrome (226415514622).

The spelling of 204202312220 in words is "two hundred four billion, two hundred two million, three hundred twelve thousand, two hundred twenty".