206347620 has 48 divisors (see below), whose sum is σ = 581031360. Its totient is φ = 54715776.

The previous prime is 206347607. The next prime is 206347621. The reversal of 206347620 is 26743602.

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

It is not an unprimeable number, because it can be changed into a prime (206347621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1134 + ... + 20346.

It is an arithmetic number, because the mean of its divisors is an integer number (12104820).

Almost surely, 2^206347620 is an apocalyptic number.

206347620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206347620 is an abundant number, since it is smaller than the sum of its proper divisors (374683740).

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

206347620 is a wasteful number, since it uses less digits than its factorization.

206347620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19404 (or 19402 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 206347620 is about 14364.8049064371. The cubic root of 206347620 is about 590.9260760547.

It can be divided in two parts, 2063476 and 20, that added together give a triangular number (2063496 = T₂₀₃₁).

The spelling of 206347620 in words is "two hundred six million, three hundred forty-seven thousand, six hundred twenty".