206426620 has 12 divisors (see below), whose sum is σ = 433495944. Its totient is φ = 82570640.

The previous prime is 206426603. The next prime is 206426639. The reversal of 206426620 is 26624602.

It is a super-2 number, since 2×206426620² = 85223898889248800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5160646 + ... + 5160685.

It is an arithmetic number, because the mean of its divisors is an integer number (36124662).

Almost surely, 2^206426620 is an apocalyptic number.

206426620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206426620 is an abundant number, since it is smaller than the sum of its proper divisors (227069324).

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

206426620 is a wasteful number, since it uses less digits than its factorization.

206426620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10321340 (or 10321338 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 206426620 is about 14367.5544195942. The cubic root of 206426620 is about 591.0014782712.

It can be divided in two parts, 206426 and 620, that added together give a triangular number (207046 = T₆₄₃).

The spelling of 206426620 in words is "two hundred six million, four hundred twenty-six thousand, six hundred twenty".