206021880 has 80 divisors (see below), whose sum is σ = 692473320. Its totient is φ = 54938304.

The previous prime is 206021873. The next prime is 206021891. The reversal of 206021880 is 88120602.

206021880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28554 + ... + 35033.

Almost surely, 2^206021880 is an apocalyptic number.

206021880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206021880 is an abundant number, since it is smaller than the sum of its proper divisors (486451440).

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

206021880 is a wasteful number, since it uses less digits than its factorization.

206021880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63610 (or 63597 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 206021880 is about 14353.4623000863. The cubic root of 206021880 is about 590.6149673277.

The spelling of 206021880 in words is "two hundred six million, twenty-one thousand, eight hundred eighty".