205226786930 has 32 divisors (see below), whose sum is σ = 403010328960. Its totient is φ = 74624302720.

The previous prime is 205226786927. The next prime is 205226786957. The reversal of 205226786930 is 39687622502.

It is a super-2 number, since 2×205226786930² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3465227 + ... + 3523953.

It is an arithmetic number, because the mean of its divisors is an integer number (12594072780).

Almost surely, 2^205226786930 is an apocalyptic number.

205226786930 is a deficient number, since it is larger than the sum of its proper divisors (197783542030).

205226786930 is a wasteful number, since it uses less digits than its factorization.

205226786930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90514.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 205226786930 in words is "two hundred five billion, two hundred twenty-six million, seven hundred eighty-six thousand, nine hundred thirty".