206209290450 has 48 divisors (see below), whose sum is σ = 538314786720. Its totient is φ = 52094977920.

The previous prime is 206209290379. The next prime is 206209290487. The reversal of 206209290450 is 54092902602.

It is a super-2 number, since 2×206209290450² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206209290399 and 206209290408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36174219 + ... + 36179918.

It is an arithmetic number, because the mean of its divisors is an integer number (11214891390).

Almost surely, 2^206209290450 is an apocalyptic number.

206209290450 is an abundant number, since it is smaller than the sum of its proper divisors (332105496270).

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

206209290450 is a wasteful number, since it uses less digits than its factorization.

206209290450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72354171 (or 72354166 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 206209290450 in words is "two hundred six billion, two hundred nine million, two hundred ninety thousand, four hundred fifty".