205720070 has 8 divisors (see below), whose sum is σ = 370296144. Its totient is φ = 82288024.

The previous prime is 205720033. The next prime is 205720091. The reversal of 205720070 is 70027502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10285994 + ... + 10286013.

It is an arithmetic number, because the mean of its divisors is an integer number (46287018).

Almost surely, 2^205720070 is an apocalyptic number.

205720070 is a deficient number, since it is larger than the sum of its proper divisors (164576074).

205720070 is a wasteful number, since it uses less digits than its factorization.

205720070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572014.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 205720070 is about 14342.9449556219. The cubic root of 205720070 is about 590.3264209237.

Adding to 205720070 its reverse (70027502), we get a palindrome (275747572).

The spelling of 205720070 in words is "two hundred five million, seven hundred twenty thousand, seventy".