206120680 has 16 divisors (see below), whose sum is σ = 463771620. Its totient is φ = 82448256.

The previous prime is 206120671. The next prime is 206120693. The reversal of 206120680 is 86021602.

It can be written as a sum of positive squares in 2 ways, for example, as 205692964 + 427716 = 14342^2 + 654^2 .

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, 2576469 + ... + 2576548.

Almost surely, 2^206120680 is an apocalyptic number.

206120680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206120680 is an abundant number, since it is smaller than the sum of its proper divisors (257650940).

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

206120680 is a wasteful number, since it uses less digits than its factorization.

206120680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5153028 (or 5153024 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 206120680 is about 14356.9035658808. The cubic root of 206120680 is about 590.7093641516.

The spelling of 206120680 in words is "two hundred six million, one hundred twenty thousand, six hundred eighty".