20530346 has 8 divisors (see below), whose sum is σ = 30863424. Its totient is φ = 10242540.

The previous prime is 20530333. The next prime is 20530351. The reversal of 20530346 is 64303502.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10160 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (3857928).

Almost surely, 2^20530346 is an apocalyptic number.

20530346 is a deficient number, since it is larger than the sum of its proper divisors (10333078).

20530346 is a wasteful number, since it uses less digits than its factorization.

20530346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22636.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20530346 is about 4531.0424849034. The cubic root of 20530346 is about 273.8201618844.

Adding to 20530346 its reverse (64303502), we get a palindrome (84833848).

The spelling of 20530346 in words is "twenty million, five hundred thirty thousand, three hundred forty-six".