206142636 has 24 divisors (see below), whose sum is σ = 549713920. Its totient is φ = 58897872.

The previous prime is 206142631. The next prime is 206142641. The reversal of 206142636 is 636241602.

206142636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (206142631) and next prime (206142641).

It is not an unprimeable number, because it can be changed into a prime (206142631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226956 + ... + 1227123.

Almost surely, 2^206142636 is an apocalyptic number.

It is an amenable number.

206142636 is an abundant number, since it is smaller than the sum of its proper divisors (343571284).

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

206142636 is a wasteful number, since it uses less digits than its factorization.

206142636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454093 (or 2454091 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 206142636 is about 14357.6681950796. The cubic root of 206142636 is about 590.7303375514.

The spelling of 206142636 in words is "two hundred six million, one hundred forty-two thousand, six hundred thirty-six".