206641320 has 64 divisors (see below), whose sum is σ = 620896320. Its totient is φ = 55017984.

The previous prime is 206641313. The next prime is 206641339. The reversal of 206641320 is 23146602.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123127 + ... + 124793.

It is an arithmetic number, because the mean of its divisors is an integer number (9701505).

Almost surely, 2^206641320 is an apocalyptic number.

206641320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206641320 is an abundant number, since it is smaller than the sum of its proper divisors (414255000).

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

206641320 is a wasteful number, since it uses less digits than its factorization.

206641320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 206641320 is about 14375.0241738927. The cubic root of 206641320 is about 591.2063033588.

Adding to 206641320 its reverse (23146602), we get a palindrome (229787922).

The spelling of 206641320 in words is "two hundred six million, six hundred forty-one thousand, three hundred twenty".