205420034 has 8 divisors (see below), whose sum is σ = 308291088. Its totient is φ = 102656340.

The previous prime is 205420031. The next prime is 205420037. The reversal of 205420034 is 430024502.

It is an interprime number because it is at equal distance from previous prime (205420031) and next prime (205420037).

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

It is a super-2 number, since 2×205420034² = 84394780737122312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205419988 and 205420015.

It is not an unprimeable number, because it can be changed into a prime (205420031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21872 + ... + 29819.

It is an arithmetic number, because the mean of its divisors is an integer number (38536386).

Almost surely, 2^205420034 is an apocalyptic number.

205420034 is a deficient number, since it is larger than the sum of its proper divisors (102871054).

205420034 is a wasteful number, since it uses less digits than its factorization.

205420034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53680.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 205420034 is about 14332.4817809059. The cubic root of 205420034 is about 590.0392906899.

Adding to 205420034 its reverse (430024502), we get a palindrome (635444536).

The spelling of 205420034 in words is "two hundred five million, four hundred twenty thousand, thirty-four".