20350513 has 12 divisors (see below), whose sum is σ = 21961552. Its totient is φ = 18849600.

The previous prime is 20350493. The next prime is 20350531. The reversal of 20350513 is 31505302.

20350513 is nontrivially palindromic in base 16.

It is a de Polignac number, because none of the positive numbers 2^k-20350513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20354513) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 18838 + ... + 19888.

Almost surely, 2^20350513 is an apocalyptic number.

It is an amenable number.

20350513 is a deficient number, since it is larger than the sum of its proper divisors (1611039).

20350513 is a wasteful number, since it uses less digits than its factorization.

20350513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20350513 is about 4511.1542868760. The cubic root of 20350513 is about 273.0183182617.

Adding to 20350513 its reverse (31505302), we get a palindrome (51855815).

The spelling of 20350513 in words is "twenty million, three hundred fifty thousand, five hundred thirteen".