205120034 has 8 divisors (see below), whose sum is σ = 351634368. Its totient is φ = 87908580.

The previous prime is 205120033. The next prime is 205120037. The reversal of 205120034 is 430021502.

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

It is a super-2 number, since 2×205120034² = 84148456696322312, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205119994 and 205120021.

It is not an unprimeable number, because it can be changed into a prime (205120033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7325702 + ... + 7325729.

It is an arithmetic number, because the mean of its divisors is an integer number (43954296).

Almost surely, 2^205120034 is an apocalyptic number.

205120034 is a deficient number, since it is larger than the sum of its proper divisors (146514334).

205120034 is a wasteful number, since it uses less digits than its factorization.

205120034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14651440.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 205120034 is about 14322.0122189586. The cubic root of 205120034 is about 589.7519152339.

Adding to 205120034 its reverse (430021502), we get a palindrome (635141536).

The spelling of 205120034 in words is "two hundred five million, one hundred twenty thousand, thirty-four".