206425803840 has 336 divisors, whose sum is σ = 671533384896. Its totient is φ = 53718425600.

The previous prime is 206425803737. The next prime is 206425803841. The reversal of 206425803840 is 48308524602.

It is a super-2 number, since 2×206425803840² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206425803792 and 206425803801.

It is not an unprimeable number, because it can be changed into a prime (206425803841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1047846622 + ... + 1047846818.

Almost surely, 2^206425803840 is an apocalyptic number.

206425803840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206425803840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335766692448).

206425803840 is an abundant number, since it is smaller than the sum of its proper divisors (465107581056).

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

206425803840 is a wasteful number, since it uses less digits than its factorization.

206425803840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 206425803840 in words is "two hundred six billion, four hundred twenty-five million, eight hundred three thousand, eight hundred forty".