206206520274 has 12 divisors (see below), whose sum is σ = 446780793966. Its totient is φ = 68735506752.

The previous prime is 206206520251. The next prime is 206206520279. The reversal of 206206520274 is 472025602602.

206206520274 is a `hidden beast` number, since 2 + 0 + 62 + 0 + 6 + 520 + 2 + 74 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162945432225 + 43261088049 = 403665^2 + 207993^2 .

It is a super-2 number, since 2×206206520274² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206206520279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5727958879 + ... + 5727958914.

Almost surely, 2^206206520274 is an apocalyptic number.

206206520274 is an abundant number, since it is smaller than the sum of its proper divisors (240574273692).

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

206206520274 is a wasteful number, since it uses less digits than its factorization.

206206520274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11455917801 (or 11455917798 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 206206520274 in words is "two hundred six billion, two hundred six million, five hundred twenty thousand, two hundred seventy-four".