206020581820 has 24 divisors (see below), whose sum is σ = 446599456128. Its totient is φ = 79749902400.

The previous prime is 206020581787. The next prime is 206020581847. The reversal of 206020581820 is 28185020602.

It is a super-3 number, since 3×206020581820³ (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 7 ways as a sum of consecutive naturals, for example, 166145011 + ... + 166146250.

It is an arithmetic number, because the mean of its divisors is an integer number (18608310672).

Almost surely, 2^206020581820 is an apocalyptic number.

206020581820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206020581820 is an abundant number, since it is smaller than the sum of its proper divisors (240578874308).

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

206020581820 is a wasteful number, since it uses less digits than its factorization.

206020581820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332291301 (or 332291299 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 206020581820 in words is "two hundred six billion, twenty million, five hundred eighty-one thousand, eight hundred twenty".