205356104220 has 48 divisors (see below), whose sum is σ = 575408332800. Its totient is φ = 54722462016.

The previous prime is 205356104201. The next prime is 205356104231. The reversal of 205356104220 is 22401653502.

It is a super-2 number, since 2×205356104220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1139292 + ... + 1307171.

It is an arithmetic number, because the mean of its divisors is an integer number (11987673600).

Almost surely, 2^205356104220 is an apocalyptic number.

205356104220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205356104220 is an abundant number, since it is smaller than the sum of its proper divisors (370052228580).

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

205356104220 is a wasteful number, since it uses less digits than its factorization.

205356104220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447874 (or 2447872 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 205356104220 its reverse (22401653502), we get a palindrome (227757757722).

The spelling of 205356104220 in words is "two hundred five billion, three hundred fifty-six million, one hundred four thousand, two hundred twenty".