206620434 has 12 divisors (see below), whose sum is σ = 447677646. Its totient is φ = 68873472.

The previous prime is 206620433. The next prime is 206620483. The reversal of 206620434 is 434026602.

206620434 is a `hidden beast` number, since 2 + 0 + 6 + 620 + 4 + 34 = 666.

It can be written as a sum of positive squares in only one way, i.e., 156875625 + 49744809 = 12525^2 + 7053^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206620398 and 206620407.

It is not an unprimeable number, because it can be changed into a prime (206620433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5739439 + ... + 5739474.

Almost surely, 2^206620434 is an apocalyptic number.

206620434 is an abundant number, since it is smaller than the sum of its proper divisors (241057212).

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

206620434 is a wasteful number, since it uses less digits than its factorization.

206620434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11478921 (or 11478918 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 206620434 is about 14374.2976871915. The cubic root of 206620434 is about 591.1863842209.

It can be divided in two parts, 2066 and 20434, that added together give a square (22500 = 150²).

The spelling of 206620434 in words is "two hundred six million, six hundred twenty thousand, four hundred thirty-four".