205420534 has 8 divisors (see below), whose sum is σ = 336142728. Its totient is φ = 93372960.

The previous prime is 205420517. The next prime is 205420541. The reversal of 205420534 is 435024502.

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

It is a junction number, because it is equal to n+sod(n) for n = 205420499 and 205420508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4668627 + ... + 4668670.

It is an arithmetic number, because the mean of its divisors is an integer number (42017841).

Almost surely, 2^205420534 is an apocalyptic number.

205420534 is a deficient number, since it is larger than the sum of its proper divisors (130722194).

205420534 is a wasteful number, since it uses less digits than its factorization.

205420534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9337310.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 205420534 is about 14332.4992237921. The cubic root of 205420534 is about 590.0397694154.

The spelling of 205420534 in words is "two hundred five million, four hundred twenty thousand, five hundred thirty-four".