206287919450 has 12 divisors (see below), whose sum is σ = 383695530270. Its totient is φ = 82515167760.

The previous prime is 206287919419. The next prime is 206287919477. The reversal of 206287919450 is 54919782602.

It can be written as a sum of positive squares in 3 ways, for example, as 77863879681 + 128424039769 = 279041^2 + 358363^2 .

It is a super-2 number, since 2×206287919450² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 206287919392 and 206287919401.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2062879145 + ... + 2062879244.

Almost surely, 2^206287919450 is an apocalyptic number.

206287919450 is a deficient number, since it is larger than the sum of its proper divisors (177407610820).

206287919450 is a wasteful number, since it uses less digits than its factorization.

206287919450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125758401 (or 4125758396 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 206287919450 in words is "two hundred six billion, two hundred eighty-seven million, nine hundred nineteen thousand, four hundred fifty".