206023400242 has 64 divisors (see below), whose sum is σ = 346637491200. Its totient is φ = 91044233280.

The previous prime is 206023400237. The next prime is 206023400263. The reversal of 206023400242 is 242004320602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102856413 + ... + 102858415.

It is an arithmetic number, because the mean of its divisors is an integer number (5416210800).

Almost surely, 2^206023400242 is an apocalyptic number.

206023400242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

206023400242 is a deficient number, since it is larger than the sum of its proper divisors (140614090958).

206023400242 is a wasteful number, since it uses less digits than its factorization.

206023400242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 206023400242 its reverse (242004320602), we get a palindrome (448027720844).

The spelling of 206023400242 in words is "two hundred six billion, twenty-three million, four hundred thousand, two hundred forty-two".