206405120022 has 32 divisors (see below), whose sum is σ = 414968666112. Its totient is φ = 68442075744.

The previous prime is 206405120017. The next prime is 206405120023. The reversal of 206405120022 is 220021504602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 206405119974 and 206405120001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206405120023) 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, 14587083 + ... + 14601225.

It is an arithmetic number, because the mean of its divisors is an integer number (12967770816).

Almost surely, 2^206405120022 is an apocalyptic number.

206405120022 is an abundant number, since it is smaller than the sum of its proper divisors (208563546090).

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

206405120022 is a wasteful number, since it uses less digits than its factorization.

206405120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26692.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 206405120022 its reverse (220021504602), we get a palindrome (426426624624).

The spelling of 206405120022 in words is "two hundred six billion, four hundred five million, one hundred twenty thousand, twenty-two".