206642028820 has 48 divisors (see below), whose sum is σ = 460189695168. Its totient is φ = 77673576960.

The previous prime is 206642028799. The next prime is 206642028877. The reversal of 206642028820 is 28820246602.

It is a super-3 number, since 3×206642028820³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

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, 253986 + ... + 691225.

It is an arithmetic number, because the mean of its divisors is an integer number (9587285316).

Almost surely, 2^206642028820 is an apocalyptic number.

206642028820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206642028820 is an abundant number, since it is smaller than the sum of its proper divisors (253547666348).

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

206642028820 is a wasteful number, since it uses less digits than its factorization.

206642028820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945880 (or 945878 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 206642028820 in words is "two hundred six billion, six hundred forty-two million, twenty-eight thousand, eight hundred twenty".