206243642 has 8 divisors (see below), whose sum is σ = 337489632. Its totient is φ = 93747100.

The previous prime is 206243633. The next prime is 206243647. The reversal of 206243642 is 246342602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (206243647) 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 3 ways as a sum of consecutive naturals, for example, 4687334 + ... + 4687377.

It is an arithmetic number, because the mean of its divisors is an integer number (42186204).

Almost surely, 2^206243642 is an apocalyptic number.

206243642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

206243642 is a deficient number, since it is larger than the sum of its proper divisors (131245990).

206243642 is a wasteful number, since it uses less digits than its factorization.

206243642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9374724.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 206243642 is about 14361.1852574918. The cubic root of 206243642 is about 590.8268040353.

The spelling of 206243642 in words is "two hundred six million, two hundred forty-three thousand, six hundred forty-two".